./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX --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 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:41:38,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:41:38,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:41:38,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:41:38,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:41:38,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:41:38,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:41:38,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:41:38,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:41:38,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:41:38,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:41:38,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:41:38,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:41:38,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:41:38,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:41:38,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:41:38,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:41:38,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:41:38,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:41:38,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:41:38,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:41:38,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:41:38,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:41:38,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:41:38,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:41:38,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:41:38,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:41:38,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:41:38,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:41:38,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:41:38,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:41:38,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:41:38,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:41:38,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:41:38,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:41:38,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:41:38,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:41:38,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:41:38,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:41:38,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:41:38,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:41:38,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:41:38,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:41:38,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:41:38,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:41:38,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:41:38,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:41:38,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:41:38,651 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:41:38,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:41:38,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:41:38,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:41:38,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:41:38,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:41:38,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:41:38,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:41:38,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:41:38,654 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:41:38,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:41:38,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:41:38,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:41:38,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:41:38,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:41:38,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:41:38,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:41:38,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:41:38,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:41:38,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:41:38,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:41:38,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:41:38,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:41:38,657 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_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2021-11-09 08:41:39,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:41:39,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:41:39,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:41:39,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:41:39,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:41:39,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-11-09 08:41:39,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/data/1962b6bc2/833d191307ed43e084e99217663d9b38/FLAGbeba558e4 [2021-11-09 08:41:39,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:41:39,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2021-11-09 08:41:39,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/data/1962b6bc2/833d191307ed43e084e99217663d9b38/FLAGbeba558e4 [2021-11-09 08:41:40,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/data/1962b6bc2/833d191307ed43e084e99217663d9b38 [2021-11-09 08:41:40,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:41:40,093 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:41:40,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:41:40,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:41:40,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:41:40,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbf0011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40, skipping insertion in model container [2021-11-09 08:41:40,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:41:40,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:41:40,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:41:40,553 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:41:40,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:41:40,688 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:41:40,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40 WrapperNode [2021-11-09 08:41:40,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:41:40,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:41:40,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:41:40,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:41:40,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:41:40,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:41:40,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:41:40,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:41:40,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (1/1) ... [2021-11-09 08:41:40,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:41:40,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:40,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:41:40,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:41:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:41:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:41:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:41:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:41:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 08:41:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 08:41:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 08:41:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcspn [2021-11-09 08:41:40,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:41:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:41:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:41:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:41:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:41:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:41:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:41:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:41:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:41:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:41:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:41:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:41:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:41:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:41:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 08:41:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 08:41:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 08:41:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:41:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:41:40,907 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:41:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:41:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:41:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:41:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:41:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:41:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:41:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:41:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:41:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:41:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:41:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:41:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:41:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:41:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:41:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:41:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:41:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:41:40,912 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:41:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:41:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:41:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:41:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:41:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:41:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:41:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:41:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:41:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:41:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:41:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:41:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:41:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:41:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:41:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:41:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:41:40,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:41:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:41:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:41:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:41:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:41:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:41:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:41:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:41:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:41:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:41:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:41:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:41:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:41:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:41:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:41:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:41:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:41:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:41:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:41:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:41:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:41:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:41:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcspn [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:41:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:41:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:41:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:41:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:41:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:41:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:41:41,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:41:41,580 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 08:41:41,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:41:41 BoogieIcfgContainer [2021-11-09 08:41:41,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:41:41,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:41:41,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:41:41,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:41:41,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:41:40" (1/3) ... [2021-11-09 08:41:41,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129dabd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:41:41, skipping insertion in model container [2021-11-09 08:41:41,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:41:40" (2/3) ... [2021-11-09 08:41:41,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@129dabd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:41:41, skipping insertion in model container [2021-11-09 08:41:41,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:41:41" (3/3) ... [2021-11-09 08:41:41,593 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2021-11-09 08:41:41,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:41:41,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-09 08:41:41,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:41:41,658 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 [2021-11-09 08:41:41,659 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-09 08:41:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 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) [2021-11-09 08:41:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:41:41,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:41,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:41,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash -840645379, now seen corresponding path program 1 times [2021-11-09 08:41:41,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:41,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363298281] [2021-11-09 08:41:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:41,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:41,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:41,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:41,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363298281] [2021-11-09 08:41:41,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363298281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:42,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:42,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:41:42,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147076059] [2021-11-09 08:41:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:42,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:42,029 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 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) [2021-11-09 08:41:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:42,269 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-11-09 08:41:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:41:42,272 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 [2021-11-09 08:41:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:42,283 INFO L225 Difference]: With dead ends: 71 [2021-11-09 08:41:42,283 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 08:41:42,285 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 [2021-11-09 08:41:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 08:41:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2021-11-09 08:41:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.59375) internal successors, (51), 44 states have internal predecessors, (51), 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) [2021-11-09 08:41:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-09 08:41:42,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2021-11-09 08:41:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:42,334 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-09 08:41:42,335 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) [2021-11-09 08:41:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-09 08:41:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:41:42,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:42,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:42,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:41:42,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash -838798337, now seen corresponding path program 1 times [2021-11-09 08:41:42,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:42,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15368434] [2021-11-09 08:41:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:42,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:42,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:42,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15368434] [2021-11-09 08:41:42,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15368434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:42,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:42,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:41:42,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92491329] [2021-11-09 08:41:42,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:42,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:42,497 INFO L87 Difference]: Start difference. First operand 50 states and 56 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) [2021-11-09 08:41:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:42,716 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-11-09 08:41:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:41:42,717 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 [2021-11-09 08:41:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:42,724 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:41:42,724 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 08:41:42,725 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 [2021-11-09 08:41:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 08:41:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-11-09 08:41:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 46 states have internal predecessors, (55), 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) [2021-11-09 08:41:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-09 08:41:42,746 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 11 [2021-11-09 08:41:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:42,747 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-09 08:41:42,747 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) [2021-11-09 08:41:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-09 08:41:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:41:42,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:42,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:42,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:41:42,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -838798338, now seen corresponding path program 1 times [2021-11-09 08:41:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:42,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524482636] [2021-11-09 08:41:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:42,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:42,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:42,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:42,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524482636] [2021-11-09 08:41:42,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524482636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:42,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:42,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:41:42,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784930247] [2021-11-09 08:41:42,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:41:42,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:41:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:41:42,899 INFO L87 Difference]: Start difference. First operand 52 states and 60 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) [2021-11-09 08:41:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,022 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-09 08:41:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:41:43,026 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 [2021-11-09 08:41:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,027 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:41:43,028 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:41:43,029 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 [2021-11-09 08:41:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:41:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-09 08:41:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-11-09 08:41:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-09 08:41:43,049 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 11 [2021-11-09 08:41:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,049 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-09 08:41:43,050 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) [2021-11-09 08:41:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-09 08:41:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:41:43,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:43,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:41:43,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -406408972, now seen corresponding path program 1 times [2021-11-09 08:41:43,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:43,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858961546] [2021-11-09 08:41:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:43,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:43,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:43,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858961546] [2021-11-09 08:41:43,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858961546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:43,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:43,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:41:43,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690705243] [2021-11-09 08:41:43,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:43,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:43,180 INFO L87 Difference]: Start difference. First operand 50 states and 57 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) [2021-11-09 08:41:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,300 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-09 08:41:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:41:43,301 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 [2021-11-09 08:41:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,302 INFO L225 Difference]: With dead ends: 49 [2021-11-09 08:41:43,302 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 08:41:43,303 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 [2021-11-09 08:41:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 08:41:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-09 08:41:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.5) internal successors, (51), 43 states have internal predecessors, (51), 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) [2021-11-09 08:41:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-09 08:41:43,309 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 13 [2021-11-09 08:41:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-09 08:41:43,310 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) [2021-11-09 08:41:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-09 08:41:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:41:43,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:41:43,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -406408920, now seen corresponding path program 1 times [2021-11-09 08:41:43,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:43,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899525818] [2021-11-09 08:41:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:43,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:43,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:43,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899525818] [2021-11-09 08:41:43,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899525818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:43,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:43,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:41:43,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452899317] [2021-11-09 08:41:43,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:43,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:43,383 INFO L87 Difference]: Start difference. First operand 49 states and 56 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) [2021-11-09 08:41:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,504 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-11-09 08:41:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:41:43,505 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 [2021-11-09 08:41:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,506 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:41:43,506 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:41:43,507 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 [2021-11-09 08:41:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:41:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-09 08:41:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 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) [2021-11-09 08:41:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-11-09 08:41:43,514 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 13 [2021-11-09 08:41:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,514 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-11-09 08:41:43,515 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) [2021-11-09 08:41:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-11-09 08:41:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:41:43,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,516 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:43,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:41:43,516 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash -349150618, now seen corresponding path program 1 times [2021-11-09 08:41:43,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:43,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095685908] [2021-11-09 08:41:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:43,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:43,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:43,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095685908] [2021-11-09 08:41:43,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095685908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:43,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:43,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:41:43,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654408121] [2021-11-09 08:41:43,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:41:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:41:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:41:43,569 INFO L87 Difference]: Start difference. First operand 60 states and 70 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) [2021-11-09 08:41:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,656 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-11-09 08:41:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:41:43,657 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 [2021-11-09 08:41:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,658 INFO L225 Difference]: With dead ends: 58 [2021-11-09 08:41:43,658 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 08:41:43,658 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 [2021-11-09 08:41:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 08:41:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-09 08:41:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.4) internal successors, (63), 52 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) [2021-11-09 08:41:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-11-09 08:41:43,665 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 13 [2021-11-09 08:41:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,665 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-11-09 08:41:43,665 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) [2021-11-09 08:41:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-11-09 08:41:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:41:43,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:43,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:41:43,667 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -349150617, now seen corresponding path program 1 times [2021-11-09 08:41:43,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:43,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781904130] [2021-11-09 08:41:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:43,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:43,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:43,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781904130] [2021-11-09 08:41:43,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781904130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:43,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:43,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:41:43,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65545618] [2021-11-09 08:41:43,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:41:43,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:41:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:41:43,770 INFO L87 Difference]: Start difference. First operand 58 states and 68 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) [2021-11-09 08:41:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,921 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-11-09 08:41:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:41:43,922 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 [2021-11-09 08:41:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,923 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:41:43,923 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:41:43,923 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 [2021-11-09 08:41:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:41:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-11-09 08:41:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 54 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) [2021-11-09 08:41:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-09 08:41:43,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 13 [2021-11-09 08:41:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,930 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-09 08:41:43,930 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) [2021-11-09 08:41:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-09 08:41:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:41:43,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:43,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:41:43,932 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 286223756, now seen corresponding path program 1 times [2021-11-09 08:41:43,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:43,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114590525] [2021-11-09 08:41:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:43,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:44,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:44,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114590525] [2021-11-09 08:41:44,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114590525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:44,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:41:44,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673722653] [2021-11-09 08:41:44,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:44,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:44,006 INFO L87 Difference]: Start difference. First operand 60 states and 71 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) [2021-11-09 08:41:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:44,102 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-11-09 08:41:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:41:44,103 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 [2021-11-09 08:41:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:44,104 INFO L225 Difference]: With dead ends: 59 [2021-11-09 08:41:44,104 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 08:41:44,104 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 [2021-11-09 08:41:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 08:41:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-09 08:41:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 53 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) [2021-11-09 08:41:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-09 08:41:44,110 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 14 [2021-11-09 08:41:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:44,110 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-09 08:41:44,111 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) [2021-11-09 08:41:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-09 08:41:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:41:44,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:44,112 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:44,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:41:44,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1011627202, now seen corresponding path program 1 times [2021-11-09 08:41:44,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:44,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634213079] [2021-11-09 08:41:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:44,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:44,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:44,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:44,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634213079] [2021-11-09 08:41:44,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634213079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538027055] [2021-11-09 08:41:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:44,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:44,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:44,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:41:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:41:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:44,524 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:41:44,526 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 [2021-11-09 08:41:44,536 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 [2021-11-09 08:41:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:44,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538027055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:44,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:44,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-09 08:41:44,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367037859] [2021-11-09 08:41:44,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:41:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:41:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:41:44,693 INFO L87 Difference]: Start difference. First operand 59 states and 70 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) [2021-11-09 08:41:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:44,890 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-11-09 08:41:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:41:44,891 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 [2021-11-09 08:41:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:44,893 INFO L225 Difference]: With dead ends: 78 [2021-11-09 08:41:44,893 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:41:44,893 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 [2021-11-09 08:41:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:41:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-11-09 08:41:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 states have internal predecessors, (57), 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) [2021-11-09 08:41:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-09 08:41:44,904 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 15 [2021-11-09 08:41:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:44,904 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-09 08:41:44,905 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) [2021-11-09 08:41:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-09 08:41:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:41:44,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:44,911 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:44,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:45,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:45,138 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -111311105, now seen corresponding path program 1 times [2021-11-09 08:41:45,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:45,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958337354] [2021-11-09 08:41:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:45,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:45,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958337354] [2021-11-09 08:41:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958337354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:45,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:41:45,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97062201] [2021-11-09 08:41:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:41:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:41:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:41:45,251 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-09 08:41:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:45,401 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-09 08:41:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:41:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 18 [2021-11-09 08:41:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:45,403 INFO L225 Difference]: With dead ends: 53 [2021-11-09 08:41:45,403 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:41:45,403 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 [2021-11-09 08:41:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:41:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-09 08:41:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 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) [2021-11-09 08:41:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-09 08:41:45,416 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2021-11-09 08:41:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:45,418 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-09 08:41:45,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-09 08:41:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-09 08:41:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:41:45,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:45,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:45,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:41:45,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash -111311104, now seen corresponding path program 1 times [2021-11-09 08:41:45,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:45,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661895834] [2021-11-09 08:41:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:45,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:45,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:45,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661895834] [2021-11-09 08:41:45,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661895834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:45,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:45,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:41:45,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973876801] [2021-11-09 08:41:45,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:41:45,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:41:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:41:45,595 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-09 08:41:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:45,832 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-11-09 08:41:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:41:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 18 [2021-11-09 08:41:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:45,834 INFO L225 Difference]: With dead ends: 56 [2021-11-09 08:41:45,834 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 08:41:45,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:41:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 08:41:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-09 08:41:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 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) [2021-11-09 08:41:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-09 08:41:45,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2021-11-09 08:41:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:45,839 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-09 08:41:45,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-09 08:41:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-09 08:41:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:41:45,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:45,840 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:41:45,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1037476778, now seen corresponding path program 1 times [2021-11-09 08:41:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:45,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518746371] [2021-11-09 08:41:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:45,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:45,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:45,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518746371] [2021-11-09 08:41:45,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518746371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:45,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409252279] [2021-11-09 08:41:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:45,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:45,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:45,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:41:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:41:46,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:46,163 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:41:46,164 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 [2021-11-09 08:41:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:46,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409252279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:46,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:46,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-09 08:41:46,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583698634] [2021-11-09 08:41:46,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:41:46,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:41:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:41:46,311 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2021-11-09 08:41:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:46,476 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-09 08:41:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:41:46,477 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 [2021-11-09 08:41:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:46,477 INFO L225 Difference]: With dead ends: 62 [2021-11-09 08:41:46,478 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:41:46,478 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 [2021-11-09 08:41:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:41:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2021-11-09 08:41:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.255813953488372) internal successors, (54), 46 states have internal predecessors, (54), 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) [2021-11-09 08:41:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-09 08:41:46,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2021-11-09 08:41:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:46,481 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-09 08:41:46,482 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) [2021-11-09 08:41:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-09 08:41:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:41:46,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:46,483 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] [2021-11-09 08:41:46,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:46,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:46,694 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcspnErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash -354327757, now seen corresponding path program 1 times [2021-11-09 08:41:46,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:46,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137522144] [2021-11-09 08:41:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:46,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:46,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:46,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:46,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137522144] [2021-11-09 08:41:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137522144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:46,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:46,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:41:46,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699546791] [2021-11-09 08:41:46,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:41:46,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:41:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:41:46,780 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-09 08:41:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:46,976 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-11-09 08:41:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:41:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 [2021-11-09 08:41:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:46,977 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:41:46,977 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 08:41:46,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:41:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 08:41:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-09 08:41:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 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) [2021-11-09 08:41:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-09 08:41:46,980 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 21 [2021-11-09 08:41:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:46,980 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-09 08:41:46,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-09 08:41:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-09 08:41:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 08:41:46,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:46,981 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] [2021-11-09 08:41:46,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:41:46,981 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:46,981 INFO L85 PathProgramCache]: Analyzing trace with hash -354327756, now seen corresponding path program 1 times [2021-11-09 08:41:46,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:46,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634031227] [2021-11-09 08:41:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:46,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:47,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:47,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634031227] [2021-11-09 08:41:47,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634031227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:47,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:47,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 08:41:47,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914628513] [2021-11-09 08:41:47,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:41:47,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:41:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:41:47,132 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-09 08:41:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:47,387 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-11-09 08:41:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:41:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-11-09 08:41:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:47,389 INFO L225 Difference]: With dead ends: 55 [2021-11-09 08:41:47,389 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:41:47,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:41:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:41:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-11-09 08:41:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-11-09 08:41:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-09 08:41:47,392 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2021-11-09 08:41:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:47,392 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-09 08:41:47,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-09 08:41:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-09 08:41:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:41:47,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:47,394 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:47,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:41:47,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 63675694, now seen corresponding path program 1 times [2021-11-09 08:41:47,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:47,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121048039] [2021-11-09 08:41:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:47,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:47,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:47,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121048039] [2021-11-09 08:41:47,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121048039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:47,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:47,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:41:47,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902978169] [2021-11-09 08:41:47,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:41:47,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:41:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:41:47,570 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-09 08:41:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:48,097 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-09 08:41:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:41:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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 26 [2021-11-09 08:41:48,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:48,098 INFO L225 Difference]: With dead ends: 81 [2021-11-09 08:41:48,099 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 08:41:48,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:41:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 08:41:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2021-11-09 08:41:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 62 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:41:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-09 08:41:48,103 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 26 [2021-11-09 08:41:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:48,103 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-09 08:41:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-09 08:41:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-09 08:41:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:41:48,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:48,104 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:48,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:41:48,105 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:48,105 INFO L85 PathProgramCache]: Analyzing trace with hash 63673516, now seen corresponding path program 1 times [2021-11-09 08:41:48,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:48,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423784620] [2021-11-09 08:41:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:48,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:48,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:48,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:48,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423784620] [2021-11-09 08:41:48,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423784620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:48,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:48,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:41:48,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391389918] [2021-11-09 08:41:48,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:41:48,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:48,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:41:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:41:48,352 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-09 08:41:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:48,761 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-11-09 08:41:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:41:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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 26 [2021-11-09 08:41:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:48,766 INFO L225 Difference]: With dead ends: 112 [2021-11-09 08:41:48,766 INFO L226 Difference]: Without dead ends: 111 [2021-11-09 08:41:48,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:41:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-09 08:41:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-11-09 08:41:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 08:41:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-09 08:41:48,780 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 26 [2021-11-09 08:41:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:48,781 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-09 08:41:48,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-09 08:41:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-09 08:41:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:41:48,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:48,783 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:48,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:41:48,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1625268048, now seen corresponding path program 1 times [2021-11-09 08:41:48,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:48,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921494455] [2021-11-09 08:41:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:48,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:49,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:49,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:49,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921494455] [2021-11-09 08:41:49,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921494455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:49,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-09 08:41:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679046436] [2021-11-09 08:41:49,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:41:49,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:41:49,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:41:49,059 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-11-09 08:41:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:49,532 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2021-11-09 08:41:49,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:41:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 26 [2021-11-09 08:41:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:49,534 INFO L225 Difference]: With dead ends: 159 [2021-11-09 08:41:49,534 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 08:41:49,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:41:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 08:41:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2021-11-09 08:41:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 98 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 08:41:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2021-11-09 08:41:49,543 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 26 [2021-11-09 08:41:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:49,544 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2021-11-09 08:41:49,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-11-09 08:41:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2021-11-09 08:41:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:41:49,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:49,545 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:49,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:41:49,546 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash -753974934, now seen corresponding path program 1 times [2021-11-09 08:41:49,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:49,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912297771] [2021-11-09 08:41:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:49,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:49,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:49,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912297771] [2021-11-09 08:41:49,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912297771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:49,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:49,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-09 08:41:49,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617822350] [2021-11-09 08:41:49,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:41:49,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:41:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:41:49,782 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-11-09 08:41:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:50,208 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2021-11-09 08:41:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:41:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 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 26 [2021-11-09 08:41:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:50,210 INFO L225 Difference]: With dead ends: 160 [2021-11-09 08:41:50,210 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 08:41:50,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:41:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 08:41:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 109. [2021-11-09 08:41:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 95 states have (on average 1.2) internal successors, (114), 100 states have internal predecessors, (114), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 08:41:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2021-11-09 08:41:50,218 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 26 [2021-11-09 08:41:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:50,219 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2021-11-09 08:41:50,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-11-09 08:41:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2021-11-09 08:41:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:41:50,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:50,220 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] [2021-11-09 08:41:50,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:41:50,221 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1973259744, now seen corresponding path program 1 times [2021-11-09 08:41:50,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:50,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926383017] [2021-11-09 08:41:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:50,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-09 08:41:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:50,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:50,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926383017] [2021-11-09 08:41:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926383017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:50,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:50,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:41:50,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620140899] [2021-11-09 08:41:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:41:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:41:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:41:50,359 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-09 08:41:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:50,441 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2021-11-09 08:41:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:41:50,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 27 [2021-11-09 08:41:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:50,443 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:41:50,443 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 08:41:50,443 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 [2021-11-09 08:41:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 08:41:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-09 08:41:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 76 states have internal predecessors, (88), 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) [2021-11-09 08:41:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-09 08:41:50,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 27 [2021-11-09 08:41:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-09 08:41:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-09 08:41:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-09 08:41:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:41:50,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:50,449 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:41:50,450 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1216904115, now seen corresponding path program 1 times [2021-11-09 08:41:50,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:50,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593889231] [2021-11-09 08:41:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:50,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:50,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:50,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593889231] [2021-11-09 08:41:50,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593889231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:50,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697023078] [2021-11-09 08:41:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:50,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:50,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:50,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:50,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:41:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:41:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:51,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697023078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:51,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:51,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-09 08:41:51,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503182161] [2021-11-09 08:41:51,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:41:51,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:41:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:41:51,253 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2021-11-09 08:41:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:51,862 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-09 08:41:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:41:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 30 [2021-11-09 08:41:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:51,864 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:41:51,864 INFO L226 Difference]: Without dead ends: 108 [2021-11-09 08:41:51,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:41:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-09 08:41:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-11-09 08:41:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 86 states have internal predecessors, (99), 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) [2021-11-09 08:41:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-11-09 08:41:51,870 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 30 [2021-11-09 08:41:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:51,872 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-11-09 08:41:51,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2021-11-09 08:41:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-11-09 08:41:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:41:51,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:51,875 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:51,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:52,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:52,086 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -285736377, now seen corresponding path program 1 times [2021-11-09 08:41:52,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:52,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836453428] [2021-11-09 08:41:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:52,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:52,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836453428] [2021-11-09 08:41:52,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836453428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:52,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992612328] [2021-11-09 08:41:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:52,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:52,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:52,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:41:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:41:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:52,515 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:41:52,515 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 [2021-11-09 08:41:52,520 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 [2021-11-09 08:41:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:52,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992612328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:52,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:52,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-11-09 08:41:52,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301440895] [2021-11-09 08:41:52,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:41:52,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:41:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:41:52,926 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-11-09 08:41:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:53,558 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2021-11-09 08:41:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:41:53,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 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 30 [2021-11-09 08:41:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:53,561 INFO L225 Difference]: With dead ends: 126 [2021-11-09 08:41:53,561 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 08:41:53,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:41:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 08:41:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-09 08:41:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 109 states have internal predecessors, (125), 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) [2021-11-09 08:41:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2021-11-09 08:41:53,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 30 [2021-11-09 08:41:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2021-11-09 08:41:53,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-11-09 08:41:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2021-11-09 08:41:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:41:53,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:53,569 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 08:41:53,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 08:41:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:53,790 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:41:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash 529220533, now seen corresponding path program 2 times [2021-11-09 08:41:53,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:53,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725612378] [2021-11-09 08:41:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:53,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:54,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:54,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725612378] [2021-11-09 08:41:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725612378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:54,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601111966] [2021-11-09 08:41:54,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:41:54,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:54,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:54,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:41:54,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:41:54,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:41:54,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:54,414 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 [2021-11-09 08:41:55,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:55,337 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 35 treesize of output 35 [2021-11-09 08:41:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601111966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:55,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:55,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-11-09 08:41:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529995846] [2021-11-09 08:41:55,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:41:55,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:55,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:41:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:41:55,662 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-11-09 08:41:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:59,905 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2021-11-09 08:41:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:41:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 [2021-11-09 08:41:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:59,908 INFO L225 Difference]: With dead ends: 220 [2021-11-09 08:41:59,908 INFO L226 Difference]: Without dead ends: 203 [2021-11-09 08:41:59,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=523, Invalid=4033, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:41:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-09 08:41:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 171. [2021-11-09 08:41:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 163 states have internal predecessors, (185), 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) [2021-11-09 08:41:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 192 transitions. [2021-11-09 08:41:59,919 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 192 transitions. Word has length 35 [2021-11-09 08:41:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:59,920 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 192 transitions. [2021-11-09 08:41:59,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-11-09 08:41:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 192 transitions. [2021-11-09 08:41:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:41:59,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:59,922 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 08:41:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:42:00,139 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1078601485, now seen corresponding path program 2 times [2021-11-09 08:42:00,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:00,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722561563] [2021-11-09 08:42:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:00,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:00,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722561563] [2021-11-09 08:42:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722561563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974099823] [2021-11-09 08:42:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:00,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:00,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:42:00,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:00,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:42:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:00,794 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 [2021-11-09 08:42:01,042 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 [2021-11-09 08:42:01,119 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-09 08:42:01,120 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 [2021-11-09 08:42:02,331 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 08:42:02,331 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 49 treesize of output 34 [2021-11-09 08:42:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:02,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974099823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:02,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:02,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-11-09 08:42:02,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399229958] [2021-11-09 08:42:02,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:42:02,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:42:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:42:02,381 INFO L87 Difference]: Start difference. First operand 171 states and 192 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-11-09 08:42:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:04,140 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2021-11-09 08:42:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:42:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 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 [2021-11-09 08:42:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:04,143 INFO L225 Difference]: With dead ends: 293 [2021-11-09 08:42:04,143 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 08:42:04,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:42:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 08:42:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-11-09 08:42:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 204 states have internal predecessors, (232), 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) [2021-11-09 08:42:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 240 transitions. [2021-11-09 08:42:04,153 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 240 transitions. Word has length 38 [2021-11-09 08:42:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:04,153 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 240 transitions. [2021-11-09 08:42:04,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 24 states have internal predecessors, (56), 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) [2021-11-09 08:42:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 240 transitions. [2021-11-09 08:42:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:42:04,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:04,155 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 08:42:04,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:04,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:42:04,382 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1805334096, now seen corresponding path program 3 times [2021-11-09 08:42:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:04,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009249130] [2021-11-09 08:42:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:04,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:04,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:04,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009249130] [2021-11-09 08:42:04,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009249130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:04,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7463195] [2021-11-09 08:42:04,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:42:04,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:04,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:04,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:04,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:42:04,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:42:04,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:42:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7463195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:05,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:05,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-09 08:42:05,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156108505] [2021-11-09 08:42:05,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:42:05,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:42:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:42:05,261 INFO L87 Difference]: Start difference. First operand 213 states and 240 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 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) [2021-11-09 08:42:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:05,923 INFO L93 Difference]: Finished difference Result 260 states and 289 transitions. [2021-11-09 08:42:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:42:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 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 42 [2021-11-09 08:42:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:05,926 INFO L225 Difference]: With dead ends: 260 [2021-11-09 08:42:05,926 INFO L226 Difference]: Without dead ends: 260 [2021-11-09 08:42:05,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:42:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-09 08:42:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2021-11-09 08:42:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 244 states have (on average 1.139344262295082) internal successors, (278), 245 states have internal predecessors, (278), 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) [2021-11-09 08:42:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 286 transitions. [2021-11-09 08:42:05,938 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 286 transitions. Word has length 42 [2021-11-09 08:42:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:05,939 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 286 transitions. [2021-11-09 08:42:05,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 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) [2021-11-09 08:42:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 286 transitions. [2021-11-09 08:42:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:42:05,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:05,941 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-09 08:42:05,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-09 08:42:06,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:42:06,162 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1180896726, now seen corresponding path program 3 times [2021-11-09 08:42:06,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:06,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117613499] [2021-11-09 08:42:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:06,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:06,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117613499] [2021-11-09 08:42:06,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117613499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543677870] [2021-11-09 08:42:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:42:06,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:06,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:06,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:42:06,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:42:06,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:42:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:06,865 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 [2021-11-09 08:42:07,180 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 [2021-11-09 08:42:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:07,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543677870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:07,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:07,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 28 [2021-11-09 08:42:07,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802677350] [2021-11-09 08:42:07,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:42:07,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:42:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:42:07,202 INFO L87 Difference]: Start difference. First operand 254 states and 286 transitions. Second operand has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-11-09 08:42:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:08,646 INFO L93 Difference]: Finished difference Result 416 states and 458 transitions. [2021-11-09 08:42:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:42:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 44 [2021-11-09 08:42:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:08,649 INFO L225 Difference]: With dead ends: 416 [2021-11-09 08:42:08,649 INFO L226 Difference]: Without dead ends: 360 [2021-11-09 08:42:08,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:42:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-09 08:42:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 326. [2021-11-09 08:42:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 315 states have (on average 1.1333333333333333) internal successors, (357), 316 states have internal predecessors, (357), 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) [2021-11-09 08:42:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 366 transitions. [2021-11-09 08:42:08,661 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 366 transitions. Word has length 44 [2021-11-09 08:42:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:08,662 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 366 transitions. [2021-11-09 08:42:08,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-11-09 08:42:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 366 transitions. [2021-11-09 08:42:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:42:08,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:08,664 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-09 08:42:08,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:08,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:08,878 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1997490311, now seen corresponding path program 4 times [2021-11-09 08:42:08,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:08,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422142083] [2021-11-09 08:42:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:08,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:09,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:09,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422142083] [2021-11-09 08:42:09,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422142083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:09,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072219557] [2021-11-09 08:42:09,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:42:09,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:09,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:09,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:42:09,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:42:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:42:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:09,482 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:09,483 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 [2021-11-09 08:42:09,765 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 [2021-11-09 08:42:10,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:10,362 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 21 treesize of output 21 [2021-11-09 08:42:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:10,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072219557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:10,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:10,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-11-09 08:42:10,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509649214] [2021-11-09 08:42:10,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:42:10,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:42:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:42:10,644 INFO L87 Difference]: Start difference. First operand 326 states and 366 transitions. Second operand has 31 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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) [2021-11-09 08:42:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:13,171 INFO L93 Difference]: Finished difference Result 417 states and 459 transitions. [2021-11-09 08:42:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:42:13,172 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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 48 [2021-11-09 08:42:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:13,175 INFO L225 Difference]: With dead ends: 417 [2021-11-09 08:42:13,175 INFO L226 Difference]: Without dead ends: 417 [2021-11-09 08:42:13,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=344, Invalid=2736, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:42:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-09 08:42:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 351. [2021-11-09 08:42:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 340 states have (on average 1.1352941176470588) internal successors, (386), 341 states have internal predecessors, (386), 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) [2021-11-09 08:42:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 395 transitions. [2021-11-09 08:42:13,191 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 395 transitions. Word has length 48 [2021-11-09 08:42:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:13,191 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 395 transitions. [2021-11-09 08:42:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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) [2021-11-09 08:42:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 395 transitions. [2021-11-09 08:42:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:42:13,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:13,193 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-09 08:42:13,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:42:13,418 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash 105706492, now seen corresponding path program 4 times [2021-11-09 08:42:13,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:13,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416052999] [2021-11-09 08:42:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:13,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:13,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416052999] [2021-11-09 08:42:13,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416052999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:13,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610455459] [2021-11-09 08:42:13,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:42:13,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:13,814 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:42:14,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:42:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:42:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:14,242 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:14,243 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 [2021-11-09 08:42:14,253 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 [2021-11-09 08:42:14,624 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 [2021-11-09 08:42:14,693 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-09 08:42:14,694 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 [2021-11-09 08:42:15,599 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:42:15,599 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 50 treesize of output 42 [2021-11-09 08:42:15,623 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-09 08:42:15,623 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 42 treesize of output 28 [2021-11-09 08:42:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610455459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:15,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2021-11-09 08:42:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091451614] [2021-11-09 08:42:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:42:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:42:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:42:15,652 INFO L87 Difference]: Start difference. First operand 351 states and 395 transitions. Second operand has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 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) [2021-11-09 08:42:28,615 WARN L207 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-11-09 08:42:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:34,561 INFO L93 Difference]: Finished difference Result 619 states and 679 transitions. [2021-11-09 08:42:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:42:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 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 50 [2021-11-09 08:42:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:34,565 INFO L225 Difference]: With dead ends: 619 [2021-11-09 08:42:34,565 INFO L226 Difference]: Without dead ends: 488 [2021-11-09 08:42:34,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=452, Invalid=3708, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:42:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-09 08:42:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 402. [2021-11-09 08:42:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 390 states have (on average 1.1358974358974359) internal successors, (443), 391 states have internal predecessors, (443), 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) [2021-11-09 08:42:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 453 transitions. [2021-11-09 08:42:34,585 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 453 transitions. Word has length 50 [2021-11-09 08:42:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:34,585 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 453 transitions. [2021-11-09 08:42:34,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 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) [2021-11-09 08:42:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 453 transitions. [2021-11-09 08:42:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:42:34,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:34,588 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-11-09 08:42:34,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:34,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:42:34,802 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1596396475, now seen corresponding path program 5 times [2021-11-09 08:42:34,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:34,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154094983] [2021-11-09 08:42:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:34,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:35,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:35,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154094983] [2021-11-09 08:42:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154094983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109774161] [2021-11-09 08:42:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:42:35,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:35,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:35,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:42:35,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:42:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:35,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 08:42:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:35,712 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:35,714 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 [2021-11-09 08:42:36,083 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 [2021-11-09 08:42:37,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:37,115 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 30 treesize of output 30 [2021-11-09 08:42:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:37,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109774161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:37,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:37,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2021-11-09 08:42:37,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098060451] [2021-11-09 08:42:37,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:42:37,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:42:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:42:37,482 INFO L87 Difference]: Start difference. First operand 402 states and 453 transitions. Second operand has 39 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 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) [2021-11-09 08:42:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:43,175 INFO L93 Difference]: Finished difference Result 759 states and 832 transitions. [2021-11-09 08:42:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 08:42:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 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 53 [2021-11-09 08:42:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:43,183 INFO L225 Difference]: With dead ends: 759 [2021-11-09 08:42:43,183 INFO L226 Difference]: Without dead ends: 648 [2021-11-09 08:42:43,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=688, Invalid=6968, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:42:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-09 08:42:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 523. [2021-11-09 08:42:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 510 states have (on average 1.1352941176470588) internal successors, (579), 511 states have internal predecessors, (579), 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) [2021-11-09 08:42:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 590 transitions. [2021-11-09 08:42:43,211 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 590 transitions. Word has length 53 [2021-11-09 08:42:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:43,212 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 590 transitions. [2021-11-09 08:42:43,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 36 states have internal predecessors, (94), 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) [2021-11-09 08:42:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 590 transitions. [2021-11-09 08:42:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:42:43,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:43,215 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-09 08:42:43,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:43,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:42:43,430 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1101540825, now seen corresponding path program 5 times [2021-11-09 08:42:43,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:43,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031197479] [2021-11-09 08:42:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:43,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:43,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:43,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:43,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031197479] [2021-11-09 08:42:43,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031197479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:43,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450856512] [2021-11-09 08:42:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:42:43,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:43,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:43,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:42:44,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:42:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 08:42:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:44,450 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:44,451 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 [2021-11-09 08:42:44,459 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 [2021-11-09 08:42:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:45,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450856512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:45,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:45,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-11-09 08:42:45,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918125425] [2021-11-09 08:42:45,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:42:45,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:42:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:42:45,373 INFO L87 Difference]: Start difference. First operand 523 states and 590 transitions. Second operand has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 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) [2021-11-09 08:42:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:46,392 INFO L93 Difference]: Finished difference Result 624 states and 699 transitions. [2021-11-09 08:42:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:42:46,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 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 54 [2021-11-09 08:42:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:46,397 INFO L225 Difference]: With dead ends: 624 [2021-11-09 08:42:46,397 INFO L226 Difference]: Without dead ends: 624 [2021-11-09 08:42:46,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:42:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-09 08:42:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 615. [2021-11-09 08:42:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 602 states have (on average 1.1345514950166113) internal successors, (683), 603 states have internal predecessors, (683), 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) [2021-11-09 08:42:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 694 transitions. [2021-11-09 08:42:46,419 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 694 transitions. Word has length 54 [2021-11-09 08:42:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:46,420 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 694 transitions. [2021-11-09 08:42:46,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 24 states have internal predecessors, (96), 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) [2021-11-09 08:42:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 694 transitions. [2021-11-09 08:42:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:42:46,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:46,423 INFO L513 BasicCegarLoop]: trace histogram [6, 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] [2021-11-09 08:42:46,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:46,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:42:46,643 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:46,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1447794852, now seen corresponding path program 6 times [2021-11-09 08:42:46,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:46,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157178491] [2021-11-09 08:42:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:46,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:47,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:47,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157178491] [2021-11-09 08:42:47,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157178491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:47,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412918016] [2021-11-09 08:42:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:42:47,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:47,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:47,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:42:47,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:42:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 08:42:47,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:47,926 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:47,927 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 [2021-11-09 08:42:48,328 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 [2021-11-09 08:42:49,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:49,479 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 30 treesize of output 30 [2021-11-09 08:42:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:49,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412918016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:49,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:49,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 42 [2021-11-09 08:42:49,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144543541] [2021-11-09 08:42:49,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:42:49,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:42:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1608, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:42:49,836 INFO L87 Difference]: Start difference. First operand 615 states and 694 transitions. Second operand has 42 states, 40 states have (on average 2.8) internal successors, (112), 39 states have internal predecessors, (112), 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) [2021-11-09 08:42:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:57,809 INFO L93 Difference]: Finished difference Result 1094 states and 1205 transitions. [2021-11-09 08:42:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 08:42:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 39 states have internal predecessors, (112), 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 62 [2021-11-09 08:42:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:57,815 INFO L225 Difference]: With dead ends: 1094 [2021-11-09 08:42:57,815 INFO L226 Difference]: Without dead ends: 962 [2021-11-09 08:42:57,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1178, Invalid=9124, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 08:42:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-11-09 08:42:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 784. [2021-11-09 08:42:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 770 states have (on average 1.1363636363636365) internal successors, (875), 771 states have internal predecessors, (875), 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) [2021-11-09 08:42:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 887 transitions. [2021-11-09 08:42:57,877 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 887 transitions. Word has length 62 [2021-11-09 08:42:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:57,877 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 887 transitions. [2021-11-09 08:42:57,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 39 states have internal predecessors, (112), 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) [2021-11-09 08:42:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 887 transitions. [2021-11-09 08:42:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:42:57,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:57,880 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-11-09 08:42:57,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:58,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:58,106 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:42:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1880248965, now seen corresponding path program 6 times [2021-11-09 08:42:58,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:58,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861439656] [2021-11-09 08:42:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:58,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:58,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:58,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:58,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861439656] [2021-11-09 08:42:58,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861439656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:58,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401387021] [2021-11-09 08:42:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:42:58,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:58,596 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:58,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:42:59,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:42:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 08:42:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:59,380 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:42:59,380 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 [2021-11-09 08:43:00,157 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 30 treesize of output 26 [2021-11-09 08:43:00,296 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-11-09 08:43:00,296 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 46 treesize of output 45 [2021-11-09 08:43:04,306 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-09 08:43:04,306 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 59 treesize of output 43 [2021-11-09 08:43:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:04,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401387021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:04,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:04,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-11-09 08:43:04,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36820199] [2021-11-09 08:43:04,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:43:04,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:43:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:43:04,342 INFO L87 Difference]: Start difference. First operand 784 states and 887 transitions. Second operand has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 32 states have internal predecessors, (105), 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) [2021-11-09 08:43:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:08,271 INFO L93 Difference]: Finished difference Result 1389 states and 1542 transitions. [2021-11-09 08:43:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:43:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 32 states have internal predecessors, (105), 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 62 [2021-11-09 08:43:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:08,281 INFO L225 Difference]: With dead ends: 1389 [2021-11-09 08:43:08,281 INFO L226 Difference]: Without dead ends: 971 [2021-11-09 08:43:08,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=370, Invalid=4600, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:43:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-09 08:43:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 853. [2021-11-09 08:43:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 838 states have (on average 1.136038186157518) internal successors, (952), 839 states have internal predecessors, (952), 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) [2021-11-09 08:43:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 965 transitions. [2021-11-09 08:43:08,324 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 965 transitions. Word has length 62 [2021-11-09 08:43:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:08,325 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 965 transitions. [2021-11-09 08:43:08,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.088235294117647) internal successors, (105), 32 states have internal predecessors, (105), 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) [2021-11-09 08:43:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 965 transitions. [2021-11-09 08:43:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:43:08,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:08,329 INFO L513 BasicCegarLoop]: trace histogram [5, 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] [2021-11-09 08:43:08,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 08:43:08,545 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:43:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1904432926, now seen corresponding path program 7 times [2021-11-09 08:43:08,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:08,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774565781] [2021-11-09 08:43:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:08,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:08,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:08,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774565781] [2021-11-09 08:43:08,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774565781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:08,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124478275] [2021-11-09 08:43:08,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:43:08,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:08,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:08,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:43:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 08:43:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:09,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:43:09,847 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 13 treesize of output 18 [2021-11-09 08:43:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124478275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:11,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:11,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-11-09 08:43:11,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64037564] [2021-11-09 08:43:11,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:43:11,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:43:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:43:11,902 INFO L87 Difference]: Start difference. First operand 853 states and 965 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 29 states have internal predecessors, (121), 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) [2021-11-09 08:43:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:14,393 INFO L93 Difference]: Finished difference Result 1038 states and 1162 transitions. [2021-11-09 08:43:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:43:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 29 states have internal predecessors, (121), 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 66 [2021-11-09 08:43:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:14,399 INFO L225 Difference]: With dead ends: 1038 [2021-11-09 08:43:14,400 INFO L226 Difference]: Without dead ends: 1038 [2021-11-09 08:43:14,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=299, Invalid=3007, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:43:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-11-09 08:43:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 978. [2021-11-09 08:43:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 963 states have (on average 1.1360332294911735) internal successors, (1094), 964 states have internal predecessors, (1094), 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) [2021-11-09 08:43:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1107 transitions. [2021-11-09 08:43:14,434 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1107 transitions. Word has length 66 [2021-11-09 08:43:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:14,434 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1107 transitions. [2021-11-09 08:43:14,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 29 states have internal predecessors, (121), 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) [2021-11-09 08:43:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1107 transitions. [2021-11-09 08:43:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:43:14,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:14,437 INFO L513 BasicCegarLoop]: trace histogram [7, 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] [2021-11-09 08:43:14,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:14,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:14,662 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:43:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1351147839, now seen corresponding path program 7 times [2021-11-09 08:43:14,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:14,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515087422] [2021-11-09 08:43:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:14,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:15,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:15,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515087422] [2021-11-09 08:43:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515087422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558081385] [2021-11-09 08:43:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:43:15,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:15,218 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:15,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:43:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 08:43:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:16,496 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 [2021-11-09 08:43:16,903 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 [2021-11-09 08:43:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:16,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558081385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:16,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:16,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 37 [2021-11-09 08:43:16,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473462228] [2021-11-09 08:43:16,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:43:16,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:43:16,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:43:16,927 INFO L87 Difference]: Start difference. First operand 978 states and 1107 transitions. Second operand has 37 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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) [2021-11-09 08:43:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:19,280 INFO L93 Difference]: Finished difference Result 1489 states and 1662 transitions. [2021-11-09 08:43:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:43:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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 [2021-11-09 08:43:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:19,288 INFO L225 Difference]: With dead ends: 1489 [2021-11-09 08:43:19,288 INFO L226 Difference]: Without dead ends: 1278 [2021-11-09 08:43:19,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=363, Invalid=3297, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:43:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-09 08:43:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1169. [2021-11-09 08:43:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1153 states have (on average 1.1370338248048568) internal successors, (1311), 1154 states have internal predecessors, (1311), 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) [2021-11-09 08:43:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1325 transitions. [2021-11-09 08:43:19,330 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1325 transitions. Word has length 71 [2021-11-09 08:43:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 1325 transitions. [2021-11-09 08:43:19,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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) [2021-11-09 08:43:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1325 transitions. [2021-11-09 08:43:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:43:19,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:19,334 INFO L513 BasicCegarLoop]: trace histogram [6, 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] [2021-11-09 08:43:19,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:19,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:19,562 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:43:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:19,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1063013234, now seen corresponding path program 8 times [2021-11-09 08:43:19,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:19,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739040227] [2021-11-09 08:43:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:19,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:20,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:20,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739040227] [2021-11-09 08:43:20,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739040227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:20,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634542105] [2021-11-09 08:43:20,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:43:20,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:20,158 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:43:21,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:43:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 08:43:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:21,131 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 [2021-11-09 08:43:21,494 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 [2021-11-09 08:43:21,537 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-09 08:43:21,537 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 56 treesize of output 55 [2021-11-09 08:43:22,820 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-09 08:43:22,821 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 29 treesize of output 14 [2021-11-09 08:43:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:22,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634542105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:22,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:22,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 31 [2021-11-09 08:43:22,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511787775] [2021-11-09 08:43:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:43:22,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:43:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:43:22,849 INFO L87 Difference]: Start difference. First operand 1169 states and 1325 transitions. Second operand has 31 states, 30 states have (on average 3.7) internal successors, (111), 28 states have internal predecessors, (111), 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) [2021-11-09 08:43:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:55,995 INFO L93 Difference]: Finished difference Result 2034 states and 2277 transitions. [2021-11-09 08:43:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:43:55,995 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.7) internal successors, (111), 28 states have internal predecessors, (111), 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 74 [2021-11-09 08:43:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:56,004 INFO L225 Difference]: With dead ends: 2034 [2021-11-09 08:43:56,004 INFO L226 Difference]: Without dead ends: 1393 [2021-11-09 08:43:56,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=226, Invalid=2223, Unknown=1, NotChecked=0, Total=2450 [2021-11-09 08:43:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-11-09 08:43:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1242. [2021-11-09 08:43:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1225 states have (on average 1.136326530612245) internal successors, (1392), 1226 states have internal predecessors, (1392), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:43:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1407 transitions. [2021-11-09 08:43:56,044 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1407 transitions. Word has length 74 [2021-11-09 08:43:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:56,044 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1407 transitions. [2021-11-09 08:43:56,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.7) internal successors, (111), 28 states have internal predecessors, (111), 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) [2021-11-09 08:43:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1407 transitions. [2021-11-09 08:43:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:43:56,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:56,048 INFO L513 BasicCegarLoop]: trace histogram [7, 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] [2021-11-09 08:43:56,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:56,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:43:56,261 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:43:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -819022268, now seen corresponding path program 8 times [2021-11-09 08:43:56,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:56,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140368086] [2021-11-09 08:43:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:56,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:56,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:56,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:56,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140368086] [2021-11-09 08:43:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140368086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:56,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456320861] [2021-11-09 08:43:56,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:43:56,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:56,816 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:56,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:43:58,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:43:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 08:43:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:58,267 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:43:58,267 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 [2021-11-09 08:43:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456320861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:59,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:59,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2021-11-09 08:43:59,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27721479] [2021-11-09 08:43:59,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:43:59,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:43:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 08:43:59,521 INFO L87 Difference]: Start difference. First operand 1242 states and 1407 transitions. Second operand has 42 states, 40 states have (on average 3.45) internal successors, (138), 39 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) [2021-11-09 08:44:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:01,286 INFO L93 Difference]: Finished difference Result 1475 states and 1648 transitions. [2021-11-09 08:44:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:44:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.45) internal successors, (138), 39 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 75 [2021-11-09 08:44:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:01,307 INFO L225 Difference]: With dead ends: 1475 [2021-11-09 08:44:01,316 INFO L226 Difference]: Without dead ends: 1475 [2021-11-09 08:44:01,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=2567, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:44:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-11-09 08:44:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1292. [2021-11-09 08:44:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1275 states have (on average 1.1380392156862744) internal successors, (1451), 1276 states have internal predecessors, (1451), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1466 transitions. [2021-11-09 08:44:01,363 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1466 transitions. Word has length 75 [2021-11-09 08:44:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:01,364 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 1466 transitions. [2021-11-09 08:44:01,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.45) internal successors, (138), 39 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) [2021-11-09 08:44:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1466 transitions. [2021-11-09 08:44:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 08:44:01,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:01,368 INFO L513 BasicCegarLoop]: trace histogram [6, 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] [2021-11-09 08:44:01,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:01,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 08:44:01,582 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 970352491, now seen corresponding path program 9 times [2021-11-09 08:44:01,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:01,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748903843] [2021-11-09 08:44:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:01,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:02,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:02,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748903843] [2021-11-09 08:44:02,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748903843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:02,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995643264] [2021-11-09 08:44:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:44:02,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:02,026 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:02,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:44:03,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:44:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:44:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995643264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:04,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-11-09 08:44:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31632346] [2021-11-09 08:44:04,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:44:04,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:44:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:44:04,313 INFO L87 Difference]: Start difference. First operand 1292 states and 1466 transitions. Second operand has 35 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 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) [2021-11-09 08:44:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:05,675 INFO L93 Difference]: Finished difference Result 1468 states and 1659 transitions. [2021-11-09 08:44:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:44:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 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 78 [2021-11-09 08:44:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:05,682 INFO L225 Difference]: With dead ends: 1468 [2021-11-09 08:44:05,682 INFO L226 Difference]: Without dead ends: 1468 [2021-11-09 08:44:05,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:44:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-11-09 08:44:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1455. [2021-11-09 08:44:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1438 states have (on average 1.1383866481223923) internal successors, (1637), 1439 states have internal predecessors, (1637), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 1652 transitions. [2021-11-09 08:44:05,721 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 1652 transitions. Word has length 78 [2021-11-09 08:44:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:05,722 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 1652 transitions. [2021-11-09 08:44:05,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 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) [2021-11-09 08:44:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 1652 transitions. [2021-11-09 08:44:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:44:05,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:05,726 INFO L513 BasicCegarLoop]: trace histogram [8, 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] [2021-11-09 08:44:05,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:05,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:44:05,954 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2060995554, now seen corresponding path program 9 times [2021-11-09 08:44:05,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:05,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161044073] [2021-11-09 08:44:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:05,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:06,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:06,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161044073] [2021-11-09 08:44:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161044073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:06,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85248020] [2021-11-09 08:44:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:44:06,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:06,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:06,589 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:06,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:44:07,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:44:07,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 08:44:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:08,280 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 [2021-11-09 08:44:08,702 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 [2021-11-09 08:44:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:08,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85248020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:08,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:08,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 40 [2021-11-09 08:44:08,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817051298] [2021-11-09 08:44:08,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:44:08,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:44:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:44:08,720 INFO L87 Difference]: Start difference. First operand 1455 states and 1652 transitions. Second operand has 40 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 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) [2021-11-09 08:44:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:11,491 INFO L93 Difference]: Finished difference Result 2170 states and 2432 transitions. [2021-11-09 08:44:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:44:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 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 80 [2021-11-09 08:44:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:11,509 INFO L225 Difference]: With dead ends: 2170 [2021-11-09 08:44:11,509 INFO L226 Difference]: Without dead ends: 1864 [2021-11-09 08:44:11,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=395, Invalid=3895, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 08:44:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-09 08:44:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1713. [2021-11-09 08:44:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1695 states have (on average 1.1398230088495576) internal successors, (1932), 1696 states have internal predecessors, (1932), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 1948 transitions. [2021-11-09 08:44:11,556 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 1948 transitions. Word has length 80 [2021-11-09 08:44:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:11,556 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 1948 transitions. [2021-11-09 08:44:11,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 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) [2021-11-09 08:44:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 1948 transitions. [2021-11-09 08:44:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 08:44:11,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:11,561 INFO L513 BasicCegarLoop]: trace histogram [8, 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] [2021-11-09 08:44:11,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:11,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 08:44:11,774 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1990123515, now seen corresponding path program 10 times [2021-11-09 08:44:11,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:11,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464053709] [2021-11-09 08:44:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:11,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:12,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464053709] [2021-11-09 08:44:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464053709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:12,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84753477] [2021-11-09 08:44:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:44:12,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:12,363 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:12,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:44:13,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:44:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 08:44:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:13,616 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:44:13,617 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 [2021-11-09 08:44:14,064 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 [2021-11-09 08:44:15,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:44:15,072 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 21 treesize of output 21 [2021-11-09 08:44:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 72 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:15,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84753477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:15,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:15,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 42 [2021-11-09 08:44:15,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536694908] [2021-11-09 08:44:15,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:44:15,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:44:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:44:15,377 INFO L87 Difference]: Start difference. First operand 1713 states and 1948 transitions. Second operand has 43 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2021-11-09 08:44:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:19,983 INFO L93 Difference]: Finished difference Result 2110 states and 2353 transitions. [2021-11-09 08:44:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:44:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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 84 [2021-11-09 08:44:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:19,993 INFO L225 Difference]: With dead ends: 2110 [2021-11-09 08:44:19,993 INFO L226 Difference]: Without dead ends: 2110 [2021-11-09 08:44:19,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=498, Invalid=5202, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:44:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-11-09 08:44:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1768. [2021-11-09 08:44:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1750 states have (on average 1.1411428571428572) internal successors, (1997), 1751 states have internal predecessors, (1997), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2013 transitions. [2021-11-09 08:44:20,050 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 2013 transitions. Word has length 84 [2021-11-09 08:44:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:20,050 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 2013 transitions. [2021-11-09 08:44:20,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2021-11-09 08:44:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 2013 transitions. [2021-11-09 08:44:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 08:44:20,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:20,055 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-11-09 08:44:20,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:20,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:44:20,268 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 637458967, now seen corresponding path program 10 times [2021-11-09 08:44:20,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:20,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760379903] [2021-11-09 08:44:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:20,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:20,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760379903] [2021-11-09 08:44:20,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760379903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671745553] [2021-11-09 08:44:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:44:20,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:20,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:20,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:44:22,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:44:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:22,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 08:44:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:22,387 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:44:22,387 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 [2021-11-09 08:44:23,375 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 27 treesize of output 23 [2021-11-09 08:44:23,495 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-11-09 08:44:23,496 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 43 treesize of output 42 [2021-11-09 08:44:25,485 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-11-09 08:44:25,485 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 58 treesize of output 37 [2021-11-09 08:44:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 64 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:25,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671745553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:25,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:25,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 46 [2021-11-09 08:44:25,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846262504] [2021-11-09 08:44:25,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:44:25,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:44:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:44:25,516 INFO L87 Difference]: Start difference. First operand 1768 states and 2013 transitions. Second operand has 46 states, 45 states have (on average 3.4) internal successors, (153), 43 states have internal predecessors, (153), 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) [2021-11-09 08:44:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:31,611 INFO L93 Difference]: Finished difference Result 3143 states and 3535 transitions. [2021-11-09 08:44:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 08:44:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.4) internal successors, (153), 43 states have internal predecessors, (153), 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 86 [2021-11-09 08:44:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:31,622 INFO L225 Difference]: With dead ends: 3143 [2021-11-09 08:44:31,622 INFO L226 Difference]: Without dead ends: 2095 [2021-11-09 08:44:31,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=646, Invalid=9056, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 08:44:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-09 08:44:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1855. [2021-11-09 08:44:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1836 states have (on average 1.1405228758169934) internal successors, (2094), 1837 states have internal predecessors, (2094), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2111 transitions. [2021-11-09 08:44:31,665 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2111 transitions. Word has length 86 [2021-11-09 08:44:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:31,666 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2111 transitions. [2021-11-09 08:44:31,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.4) internal successors, (153), 43 states have internal predecessors, (153), 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) [2021-11-09 08:44:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2111 transitions. [2021-11-09 08:44:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:44:31,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:31,671 INFO L513 BasicCegarLoop]: trace histogram [9, 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] [2021-11-09 08:44:31,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:31,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:44:31,892 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash 850396359, now seen corresponding path program 11 times [2021-11-09 08:44:31,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:31,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752661904] [2021-11-09 08:44:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:31,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:32,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:32,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752661904] [2021-11-09 08:44:32,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752661904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:32,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657472477] [2021-11-09 08:44:32,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:44:32,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:32,546 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:32,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:44:33,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-09 08:44:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 08:44:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:34,343 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 [2021-11-09 08:44:34,733 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 [2021-11-09 08:44:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657472477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:34,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:34,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 43 [2021-11-09 08:44:34,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457800768] [2021-11-09 08:44:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:44:34,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:44:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1694, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:44:34,748 INFO L87 Difference]: Start difference. First operand 1855 states and 2111 transitions. Second operand has 43 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 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) [2021-11-09 08:44:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:37,839 INFO L93 Difference]: Finished difference Result 2742 states and 3081 transitions. [2021-11-09 08:44:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:44:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 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 [2021-11-09 08:44:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:37,849 INFO L225 Difference]: With dead ends: 2742 [2021-11-09 08:44:37,850 INFO L226 Difference]: Without dead ends: 2325 [2021-11-09 08:44:37,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=427, Invalid=4543, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:44:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-11-09 08:44:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2147. [2021-11-09 08:44:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2127 states have (on average 1.1419840150446638) internal successors, (2429), 2128 states have internal predecessors, (2429), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2447 transitions. [2021-11-09 08:44:37,910 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2447 transitions. Word has length 89 [2021-11-09 08:44:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:37,910 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 2447 transitions. [2021-11-09 08:44:37,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 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) [2021-11-09 08:44:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2447 transitions. [2021-11-09 08:44:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-09 08:44:37,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:37,914 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-11-09 08:44:37,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:38,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:44:38,142 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1708337524, now seen corresponding path program 11 times [2021-11-09 08:44:38,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:38,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426927198] [2021-11-09 08:44:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:38,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:38,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426927198] [2021-11-09 08:44:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426927198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:38,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718115160] [2021-11-09 08:44:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:44:38,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:38,495 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:38,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:44:39,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 08:44:39,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 08:44:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:39,874 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:44:39,874 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 [2021-11-09 08:44:39,877 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 [2021-11-09 08:44:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:41,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718115160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:41,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:41,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-11-09 08:44:41,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087003067] [2021-11-09 08:44:41,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:44:41,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:44:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:44:41,037 INFO L87 Difference]: Start difference. First operand 2147 states and 2447 transitions. Second operand has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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) [2021-11-09 08:44:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:42,672 INFO L93 Difference]: Finished difference Result 2412 states and 2742 transitions. [2021-11-09 08:44:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:44:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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 90 [2021-11-09 08:44:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:42,682 INFO L225 Difference]: With dead ends: 2412 [2021-11-09 08:44:42,682 INFO L226 Difference]: Without dead ends: 2412 [2021-11-09 08:44:42,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=2701, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:44:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-11-09 08:44:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2396. [2021-11-09 08:44:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2376 states have (on average 1.1426767676767677) internal successors, (2715), 2377 states have internal predecessors, (2715), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 2733 transitions. [2021-11-09 08:44:42,723 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 2733 transitions. Word has length 90 [2021-11-09 08:44:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:42,723 INFO L470 AbstractCegarLoop]: Abstraction has 2396 states and 2733 transitions. [2021-11-09 08:44:42,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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) [2021-11-09 08:44:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 2733 transitions. [2021-11-09 08:44:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 08:44:42,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:42,728 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:42,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:42,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:42,954 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:42,954 INFO L85 PathProgramCache]: Analyzing trace with hash 813687178, now seen corresponding path program 12 times [2021-11-09 08:44:42,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:42,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191658152] [2021-11-09 08:44:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:42,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:43,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:43,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:43,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191658152] [2021-11-09 08:44:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191658152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:43,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392031603] [2021-11-09 08:44:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:44:43,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:43,590 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:44:45,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:44:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 08:44:45,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:45,077 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:44:45,077 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 [2021-11-09 08:44:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:46,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392031603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:46,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:46,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 49 [2021-11-09 08:44:46,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267017561] [2021-11-09 08:44:46,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:44:46,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:44:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:44:46,410 INFO L87 Difference]: Start difference. First operand 2396 states and 2733 transitions. Second operand has 50 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 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) [2021-11-09 08:44:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:49,114 INFO L93 Difference]: Finished difference Result 2776 states and 3124 transitions. [2021-11-09 08:44:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:44:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 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 93 [2021-11-09 08:44:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:49,133 INFO L225 Difference]: With dead ends: 2776 [2021-11-09 08:44:49,133 INFO L226 Difference]: Without dead ends: 2776 [2021-11-09 08:44:49,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=571, Invalid=4399, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:44:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-11-09 08:44:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2461. [2021-11-09 08:44:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 2441 states have (on average 1.1437935272429332) internal successors, (2792), 2442 states have internal predecessors, (2792), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 2810 transitions. [2021-11-09 08:44:49,181 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 2810 transitions. Word has length 93 [2021-11-09 08:44:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:49,181 INFO L470 AbstractCegarLoop]: Abstraction has 2461 states and 2810 transitions. [2021-11-09 08:44:49,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 3.625) internal successors, (174), 47 states have internal predecessors, (174), 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) [2021-11-09 08:44:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 2810 transitions. [2021-11-09 08:44:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:44:49,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:49,187 INFO L513 BasicCegarLoop]: trace histogram [10, 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] [2021-11-09 08:44:49,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:49,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:49,414 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 642557080, now seen corresponding path program 13 times [2021-11-09 08:44:49,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:49,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501003147] [2021-11-09 08:44:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:49,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:50,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:50,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501003147] [2021-11-09 08:44:50,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501003147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:50,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761270301] [2021-11-09 08:44:50,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:44:50,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:50,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:50,106 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:50,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:44:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-09 08:44:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:51,878 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 [2021-11-09 08:44:52,287 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 [2021-11-09 08:44:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:52,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761270301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:52,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:52,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 46 [2021-11-09 08:44:52,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625402706] [2021-11-09 08:44:52,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:44:52,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:44:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1950, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:44:52,300 INFO L87 Difference]: Start difference. First operand 2461 states and 2810 transitions. Second operand has 46 states, 44 states have (on average 3.159090909090909) internal successors, (139), 43 states have internal predecessors, (139), 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) [2021-11-09 08:44:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:55,471 INFO L93 Difference]: Finished difference Result 3513 states and 3964 transitions. [2021-11-09 08:44:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:44:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.159090909090909) internal successors, (139), 43 states have internal predecessors, (139), 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 98 [2021-11-09 08:44:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:55,486 INFO L225 Difference]: With dead ends: 3513 [2021-11-09 08:44:55,486 INFO L226 Difference]: Without dead ends: 3051 [2021-11-09 08:44:55,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=5241, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:44:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-09 08:44:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2831. [2021-11-09 08:44:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2810 states have (on average 1.1455516014234874) internal successors, (3219), 2811 states have internal predecessors, (3219), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:44:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 3238 transitions. [2021-11-09 08:44:55,530 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 3238 transitions. Word has length 98 [2021-11-09 08:44:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 3238 transitions. [2021-11-09 08:44:55,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.159090909090909) internal successors, (139), 43 states have internal predecessors, (139), 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) [2021-11-09 08:44:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 3238 transitions. [2021-11-09 08:44:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 08:44:55,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:55,535 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-11-09 08:44:55,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:55,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 08:44:55,749 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:44:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1467907296, now seen corresponding path program 12 times [2021-11-09 08:44:55,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:55,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844131520] [2021-11-09 08:44:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:55,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:56,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:56,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844131520] [2021-11-09 08:44:56,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844131520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:56,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202614250] [2021-11-09 08:44:56,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:44:56,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:56,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:56,299 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:56,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:44:57,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 08:44:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-09 08:44:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:57,790 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:44:57,790 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 [2021-11-09 08:44:58,426 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 [2021-11-09 08:44:58,523 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-09 08:44:58,524 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 [2021-11-09 08:45:00,452 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-09 08:45:00,452 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 50 treesize of output 34 [2021-11-09 08:45:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:00,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202614250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:00,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:00,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 49 [2021-11-09 08:45:00,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753683757] [2021-11-09 08:45:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:45:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:45:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2232, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:45:00,489 INFO L87 Difference]: Start difference. First operand 2831 states and 3238 transitions. Second operand has 49 states, 48 states have (on average 3.6875) internal successors, (177), 46 states have internal predecessors, (177), 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) [2021-11-09 08:45:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:06,340 INFO L93 Difference]: Finished difference Result 5109 states and 5788 transitions. [2021-11-09 08:45:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 08:45:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.6875) internal successors, (177), 46 states have internal predecessors, (177), 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 98 [2021-11-09 08:45:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:06,354 INFO L225 Difference]: With dead ends: 5109 [2021-11-09 08:45:06,354 INFO L226 Difference]: Without dead ends: 3247 [2021-11-09 08:45:06,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=512, Invalid=8994, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 08:45:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-11-09 08:45:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2931. [2021-11-09 08:45:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2909 states have (on average 1.144723272602269) internal successors, (3330), 2910 states have internal predecessors, (3330), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:45:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 3350 transitions. [2021-11-09 08:45:06,433 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 3350 transitions. Word has length 98 [2021-11-09 08:45:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:06,433 INFO L470 AbstractCegarLoop]: Abstraction has 2931 states and 3350 transitions. [2021-11-09 08:45:06,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.6875) internal successors, (177), 46 states have internal predecessors, (177), 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) [2021-11-09 08:45:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 3350 transitions. [2021-11-09 08:45:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 08:45:06,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:06,439 INFO L513 BasicCegarLoop]: trace histogram [10, 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] [2021-11-09 08:45:06,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 08:45:06,659 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:45:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1921348405, now seen corresponding path program 14 times [2021-11-09 08:45:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:06,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533600661] [2021-11-09 08:45:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:06,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:07,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:07,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533600661] [2021-11-09 08:45:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533600661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:07,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451873314] [2021-11-09 08:45:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:45:07,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:07,336 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:07,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:45:08,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:45:08,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-09 08:45:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:09,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451873314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:09,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:09,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 43 [2021-11-09 08:45:09,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087356865] [2021-11-09 08:45:09,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:45:09,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:45:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1680, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:45:09,807 INFO L87 Difference]: Start difference. First operand 2931 states and 3350 transitions. Second operand has 44 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 41 states have internal predecessors, (147), 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) [2021-11-09 08:45:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:12,172 INFO L93 Difference]: Finished difference Result 3381 states and 3812 transitions. [2021-11-09 08:45:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:45:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 41 states have internal predecessors, (147), 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 [2021-11-09 08:45:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:12,185 INFO L225 Difference]: With dead ends: 3381 [2021-11-09 08:45:12,186 INFO L226 Difference]: Without dead ends: 3381 [2021-11-09 08:45:12,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=373, Invalid=3049, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:45:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2021-11-09 08:45:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3001. [2021-11-09 08:45:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2979 states have (on average 1.1456864719704598) internal successors, (3413), 2980 states have internal predecessors, (3413), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:45:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 3433 transitions. [2021-11-09 08:45:12,245 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 3433 transitions. Word has length 102 [2021-11-09 08:45:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 3433 transitions. [2021-11-09 08:45:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 41 states have internal predecessors, (147), 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) [2021-11-09 08:45:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 3433 transitions. [2021-11-09 08:45:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 08:45:12,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:12,251 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-11-09 08:45:12,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 08:45:12,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:12,466 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:45:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash -554651907, now seen corresponding path program 13 times [2021-11-09 08:45:12,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:12,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535702420] [2021-11-09 08:45:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:12,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:12,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:12,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535702420] [2021-11-09 08:45:12,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535702420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:12,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161427550] [2021-11-09 08:45:12,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:45:12,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:12,970 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:12,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:45:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 08:45:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:14,673 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:45:14,674 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 13 treesize of output 18 [2021-11-09 08:45:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:17,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161427550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:17,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:17,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-11-09 08:45:17,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729001153] [2021-11-09 08:45:17,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:45:17,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:45:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:45:17,753 INFO L87 Difference]: Start difference. First operand 3001 states and 3433 transitions. Second operand has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 41 states have internal predecessors, (193), 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) [2021-11-09 08:45:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:21,832 INFO L93 Difference]: Finished difference Result 3399 states and 3870 transitions. [2021-11-09 08:45:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:45:21,833 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 41 states have internal predecessors, (193), 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 [2021-11-09 08:45:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:21,840 INFO L225 Difference]: With dead ends: 3399 [2021-11-09 08:45:21,840 INFO L226 Difference]: Without dead ends: 3399 [2021-11-09 08:45:21,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=476, Invalid=5686, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:45:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-11-09 08:45:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3308. [2021-11-09 08:45:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3286 states have (on average 1.1463785757760194) internal successors, (3767), 3287 states have internal predecessors, (3767), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:45:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 3787 transitions. [2021-11-09 08:45:21,881 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 3787 transitions. Word has length 102 [2021-11-09 08:45:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:21,882 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 3787 transitions. [2021-11-09 08:45:21,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 41 states have internal predecessors, (193), 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) [2021-11-09 08:45:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 3787 transitions. [2021-11-09 08:45:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 08:45:21,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:21,888 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:21,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:22,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 08:45:22,102 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:45:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -236558899, now seen corresponding path program 15 times [2021-11-09 08:45:22,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:22,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471349105] [2021-11-09 08:45:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:22,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:22,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:22,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:22,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471349105] [2021-11-09 08:45:22,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471349105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:22,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313636722] [2021-11-09 08:45:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:45:22,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:22,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:22,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:45:24,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 08:45:24,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-09 08:45:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:25,107 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 [2021-11-09 08:45:25,577 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 [2021-11-09 08:45:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:25,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313636722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:25,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:25,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 49 [2021-11-09 08:45:25,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875984127] [2021-11-09 08:45:25,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:45:25,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:45:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2224, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:45:25,591 INFO L87 Difference]: Start difference. First operand 3308 states and 3787 transitions. Second operand has 49 states, 47 states have (on average 3.234042553191489) internal successors, (152), 46 states have internal predecessors, (152), 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) [2021-11-09 08:45:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:29,452 INFO L93 Difference]: Finished difference Result 4644 states and 5256 transitions. [2021-11-09 08:45:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:45:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 3.234042553191489) internal successors, (152), 46 states have internal predecessors, (152), 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 107 [2021-11-09 08:45:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:29,457 INFO L225 Difference]: With dead ends: 4644 [2021-11-09 08:45:29,457 INFO L226 Difference]: Without dead ends: 4047 [2021-11-09 08:45:29,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=491, Invalid=5989, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:45:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-11-09 08:45:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3770. [2021-11-09 08:45:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3770 states, 3747 states have (on average 1.1481184947958367) internal successors, (4302), 3748 states have internal predecessors, (4302), 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) [2021-11-09 08:45:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3770 states to 3770 states and 4323 transitions. [2021-11-09 08:45:29,497 INFO L78 Accepts]: Start accepts. Automaton has 3770 states and 4323 transitions. Word has length 107 [2021-11-09 08:45:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:29,498 INFO L470 AbstractCegarLoop]: Abstraction has 3770 states and 4323 transitions. [2021-11-09 08:45:29,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 3.234042553191489) internal successors, (152), 46 states have internal predecessors, (152), 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) [2021-11-09 08:45:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3770 states and 4323 transitions. [2021-11-09 08:45:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 08:45:29,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:29,503 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 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] [2021-11-09 08:45:29,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:29,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 08:45:29,726 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:45:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1695977559, now seen corresponding path program 14 times [2021-11-09 08:45:29,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:29,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742417901] [2021-11-09 08:45:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:29,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:30,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:30,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:30,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742417901] [2021-11-09 08:45:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742417901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:30,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046895413] [2021-11-09 08:45:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:45:30,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:30,537 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:45:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:45:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-09 08:45:32,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:32,324 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 [2021-11-09 08:45:32,787 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 [2021-11-09 08:45:32,853 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-09 08:45:32,853 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 [2021-11-09 08:45:35,180 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 08:45:35,181 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 [2021-11-09 08:45:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046895413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:35,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:35,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-11-09 08:45:35,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861355780] [2021-11-09 08:45:35,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:45:35,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:45:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:45:35,208 INFO L87 Difference]: Start difference. First operand 3770 states and 4323 transitions. Second operand has 50 states, 49 states have (on average 4.081632653061225) internal successors, (200), 47 states have internal predecessors, (200), 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) [2021-11-09 08:45:49,193 WARN L207 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-11-09 08:45:54,709 WARN L207 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-11-09 08:46:00,023 WARN L207 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-11-09 08:46:09,968 WARN L207 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-11-09 08:46:15,614 WARN L207 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-11-09 08:46:25,639 WARN L207 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-11-09 08:46:39,237 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-11-09 08:46:58,713 WARN L207 SmtUtils]: Spent 5.49 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-11-09 08:47:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:31,546 INFO L93 Difference]: Finished difference Result 6760 states and 7701 transitions. [2021-11-09 08:47:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:47:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 4.081632653061225) internal successors, (200), 47 states have internal predecessors, (200), 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 110 [2021-11-09 08:47:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:31,555 INFO L225 Difference]: With dead ends: 6760 [2021-11-09 08:47:31,555 INFO L226 Difference]: Without dead ends: 4278 [2021-11-09 08:47:31,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=345, Invalid=5351, Unknown=4, NotChecked=0, Total=5700 [2021-11-09 08:47:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-11-09 08:47:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3879. [2021-11-09 08:47:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3855 states have (on average 1.1473411154345006) internal successors, (4423), 3856 states have internal predecessors, (4423), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:47:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 4445 transitions. [2021-11-09 08:47:31,623 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 4445 transitions. Word has length 110 [2021-11-09 08:47:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:31,624 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 4445 transitions. [2021-11-09 08:47:31,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 4.081632653061225) internal successors, (200), 47 states have internal predecessors, (200), 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) [2021-11-09 08:47:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 4445 transitions. [2021-11-09 08:47:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 08:47:31,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:31,630 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:31,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:31,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 08:47:31,858 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:47:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash -826296368, now seen corresponding path program 16 times [2021-11-09 08:47:31,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:31,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881177239] [2021-11-09 08:47:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:31,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:47:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:32,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881177239] [2021-11-09 08:47:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881177239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038698212] [2021-11-09 08:47:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:47:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:32,625 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:32,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:47:34,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:47:34,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-09 08:47:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:35,030 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:47:35,030 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 [2021-11-09 08:47:35,624 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 [2021-11-09 08:47:37,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:47:37,227 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 21 treesize of output 21 [2021-11-09 08:47:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 162 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038698212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:37,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:37,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 51 [2021-11-09 08:47:37,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410971876] [2021-11-09 08:47:37,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:47:37,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:47:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2485, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:47:37,557 INFO L87 Difference]: Start difference. First operand 3879 states and 4445 transitions. Second operand has 52 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 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) [2021-11-09 08:47:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:44,666 INFO L93 Difference]: Finished difference Result 4659 states and 5238 transitions. [2021-11-09 08:47:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 08:47:44,667 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 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 [2021-11-09 08:47:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:44,677 INFO L225 Difference]: With dead ends: 4659 [2021-11-09 08:47:44,677 INFO L226 Difference]: Without dead ends: 4659 [2021-11-09 08:47:44,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=624, Invalid=7566, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:47:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2021-11-09 08:47:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 3959. [2021-11-09 08:47:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3959 states, 3935 states have (on average 1.1481575603557814) internal successors, (4518), 3936 states have internal predecessors, (4518), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:47:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3959 states to 3959 states and 4540 transitions. [2021-11-09 08:47:44,751 INFO L78 Accepts]: Start accepts. Automaton has 3959 states and 4540 transitions. Word has length 111 [2021-11-09 08:47:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 3959 states and 4540 transitions. [2021-11-09 08:47:44,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 49 states have internal predecessors, (176), 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) [2021-11-09 08:47:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3959 states and 4540 transitions. [2021-11-09 08:47:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-09 08:47:44,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:44,759 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:44,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:44,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:44,974 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:47:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1945323514, now seen corresponding path program 15 times [2021-11-09 08:47:44,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:44,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477969295] [2021-11-09 08:47:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:44,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:47:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:45,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:45,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477969295] [2021-11-09 08:47:45,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477969295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:45,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551149084] [2021-11-09 08:47:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:47:45,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:45,598 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:45,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:47:48,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 08:47:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 08:47:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:48,109 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:47:48,110 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 [2021-11-09 08:47:48,115 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 [2021-11-09 08:47:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551149084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:49,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:49,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 45 [2021-11-09 08:47:49,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882266100] [2021-11-09 08:47:49,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:47:49,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:47:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:47:49,774 INFO L87 Difference]: Start difference. First operand 3959 states and 4540 transitions. Second operand has 46 states, 45 states have (on average 4.8) internal successors, (216), 43 states have internal predecessors, (216), 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) [2021-11-09 08:47:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:53,078 INFO L93 Difference]: Finished difference Result 4344 states and 4973 transitions. [2021-11-09 08:47:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:47:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.8) internal successors, (216), 43 states have internal predecessors, (216), 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 114 [2021-11-09 08:47:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:53,085 INFO L225 Difference]: With dead ends: 4344 [2021-11-09 08:47:53,085 INFO L226 Difference]: Without dead ends: 4344 [2021-11-09 08:47:53,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=542, Invalid=4860, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 08:47:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2021-11-09 08:47:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 4324. [2021-11-09 08:47:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4324 states, 4300 states have (on average 1.1488372093023256) internal successors, (4940), 4301 states have internal predecessors, (4940), 21 states have call successors, (21), 21 states have call predecessors, (21), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:47:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 4962 transitions. [2021-11-09 08:47:53,151 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 4962 transitions. Word has length 114 [2021-11-09 08:47:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:53,151 INFO L470 AbstractCegarLoop]: Abstraction has 4324 states and 4962 transitions. [2021-11-09 08:47:53,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.8) internal successors, (216), 43 states have internal predecessors, (216), 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) [2021-11-09 08:47:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 4962 transitions. [2021-11-09 08:47:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-09 08:47:53,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:53,158 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:53,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:53,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 08:47:53,386 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:47:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1005963794, now seen corresponding path program 17 times [2021-11-09 08:47:53,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:53,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504860802] [2021-11-09 08:47:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:53,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:54,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:47:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:54,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:54,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504860802] [2021-11-09 08:47:54,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504860802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:54,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639205517] [2021-11-09 08:47:54,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:47:54,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:54,194 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:54,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:47:56,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 08:47:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-09 08:47:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:57,368 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 [2021-11-09 08:47:57,826 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 [2021-11-09 08:47:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:47:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639205517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:57,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:57,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32] total 52 [2021-11-09 08:47:57,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899872513] [2021-11-09 08:47:57,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 08:47:57,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 08:47:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2516, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:47:57,841 INFO L87 Difference]: Start difference. First operand 4324 states and 4962 transitions. Second operand has 52 states, 50 states have (on average 3.3) internal successors, (165), 49 states have internal predecessors, (165), 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) [2021-11-09 08:48:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:03,379 INFO L93 Difference]: Finished difference Result 5976 states and 6782 transitions. [2021-11-09 08:48:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 08:48:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 3.3) internal successors, (165), 49 states have internal predecessors, (165), 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 116 [2021-11-09 08:48:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:03,387 INFO L225 Difference]: With dead ends: 5976 [2021-11-09 08:48:03,387 INFO L226 Difference]: Without dead ends: 5228 [2021-11-09 08:48:03,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=523, Invalid=6787, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 08:48:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-11-09 08:48:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4888. [2021-11-09 08:48:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4863 states have (on average 1.1505243676742751) internal successors, (5595), 4864 states have internal predecessors, (5595), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:48:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 5618 transitions. [2021-11-09 08:48:03,467 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 5618 transitions. Word has length 116 [2021-11-09 08:48:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:03,468 INFO L470 AbstractCegarLoop]: Abstraction has 4888 states and 5618 transitions. [2021-11-09 08:48:03,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 3.3) internal successors, (165), 49 states have internal predecessors, (165), 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) [2021-11-09 08:48:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 5618 transitions. [2021-11-09 08:48:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-09 08:48:03,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:03,476 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:03,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:03,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:03,702 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:48:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 643107695, now seen corresponding path program 18 times [2021-11-09 08:48:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:03,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327055854] [2021-11-09 08:48:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:03,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:04,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:48:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:04,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:04,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327055854] [2021-11-09 08:48:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327055854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:04,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082825443] [2021-11-09 08:48:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:48:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:04,546 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:04,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:48:07,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-09 08:48:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-09 08:48:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:07,527 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:48:07,527 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 [2021-11-09 08:48:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082825443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:09,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:09,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 61 [2021-11-09 08:48:09,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812447248] [2021-11-09 08:48:09,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 08:48:09,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 08:48:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:48:09,603 INFO L87 Difference]: Start difference. First operand 4888 states and 5618 transitions. Second operand has 62 states, 60 states have (on average 3.8) internal successors, (228), 59 states have internal predecessors, (228), 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) [2021-11-09 08:48:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:14,269 INFO L93 Difference]: Finished difference Result 5536 states and 6281 transitions. [2021-11-09 08:48:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:48:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 3.8) internal successors, (228), 59 states have internal predecessors, (228), 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 120 [2021-11-09 08:48:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:14,275 INFO L225 Difference]: With dead ends: 5536 [2021-11-09 08:48:14,275 INFO L226 Difference]: Without dead ends: 5536 [2021-11-09 08:48:14,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=853, Invalid=6979, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 08:48:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-11-09 08:48:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 4973. [2021-11-09 08:48:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4948 states have (on average 1.1511721907841552) internal successors, (5696), 4949 states have internal predecessors, (5696), 22 states have call successors, (22), 22 states have call predecessors, (22), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:48:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 5719 transitions. [2021-11-09 08:48:14,373 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 5719 transitions. Word has length 120 [2021-11-09 08:48:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 4973 states and 5719 transitions. [2021-11-09 08:48:14,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 3.8) internal successors, (228), 59 states have internal predecessors, (228), 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) [2021-11-09 08:48:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 5719 transitions. [2021-11-09 08:48:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-09 08:48:14,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:14,379 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 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] [2021-11-09 08:48:14,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:14,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:14,580 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:48:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash 173301682, now seen corresponding path program 16 times [2021-11-09 08:48:14,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:14,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506001831] [2021-11-09 08:48:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:14,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:48:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:15,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:15,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506001831] [2021-11-09 08:48:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506001831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:15,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544196789] [2021-11-09 08:48:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:48:15,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:15,518 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:15,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:48:18,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:48:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:18,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:48:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:18,380 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 [2021-11-09 08:48:18,390 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 [2021-11-09 08:48:19,552 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 [2021-11-09 08:48:19,632 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-09 08:48:19,632 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 [2021-11-09 08:48:22,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:48:22,513 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 50 treesize of output 42 [2021-11-09 08:48:22,529 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-09 08:48:22,529 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 42 treesize of output 28 [2021-11-09 08:48:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 243 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544196789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:22,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:22,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2021-11-09 08:48:22,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128227054] [2021-11-09 08:48:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:48:22,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:48:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:48:22,559 INFO L87 Difference]: Start difference. First operand 4973 states and 5719 transitions. Second operand has 54 states, 53 states have (on average 4.226415094339623) internal successors, (224), 51 states have internal predecessors, (224), 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) [2021-11-09 08:49:07,800 WARN L207 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-11-09 08:49:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:22,322 INFO L93 Difference]: Finished difference Result 10772 states and 12329 transitions. [2021-11-09 08:49:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 08:49:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.226415094339623) internal successors, (224), 51 states have internal predecessors, (224), 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 122 [2021-11-09 08:49:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:22,328 INFO L225 Difference]: With dead ends: 10772 [2021-11-09 08:49:22,328 INFO L226 Difference]: Without dead ends: 7459 [2021-11-09 08:49:22,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4803 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=1799, Invalid=20244, Unknown=9, NotChecked=0, Total=22052 [2021-11-09 08:49:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2021-11-09 08:49:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 5096. [2021-11-09 08:49:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5096 states, 5070 states have (on average 1.1504930966469429) internal successors, (5833), 5071 states have internal predecessors, (5833), 23 states have call successors, (23), 23 states have call predecessors, (23), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:49:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 5857 transitions. [2021-11-09 08:49:22,387 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 5857 transitions. Word has length 122 [2021-11-09 08:49:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:22,387 INFO L470 AbstractCegarLoop]: Abstraction has 5096 states and 5857 transitions. [2021-11-09 08:49:22,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.226415094339623) internal successors, (224), 51 states have internal predecessors, (224), 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) [2021-11-09 08:49:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 5857 transitions. [2021-11-09 08:49:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 08:49:22,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:22,392 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:22,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:22,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 08:49:22,593 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:49:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 185524691, now seen corresponding path program 19 times [2021-11-09 08:49:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:22,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036516540] [2021-11-09 08:49:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:22,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:23,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:49:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:23,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:23,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036516540] [2021-11-09 08:49:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036516540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:23,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7007058] [2021-11-09 08:49:23,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:49:23,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:23,414 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:23,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:49:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:25,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-09 08:49:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:26,325 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 [2021-11-09 08:49:26,894 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 [2021-11-09 08:49:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7007058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:26,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:26,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34] total 55 [2021-11-09 08:49:26,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659941150] [2021-11-09 08:49:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 08:49:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 08:49:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2826, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:49:26,911 INFO L87 Difference]: Start difference. First operand 5096 states and 5857 transitions. Second operand has 55 states, 53 states have (on average 3.358490566037736) internal successors, (178), 52 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) [2021-11-09 08:49:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:32,016 INFO L93 Difference]: Finished difference Result 7000 states and 7957 transitions. [2021-11-09 08:49:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 08:49:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.358490566037736) internal successors, (178), 52 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 125 [2021-11-09 08:49:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:32,022 INFO L225 Difference]: With dead ends: 7000 [2021-11-09 08:49:32,023 INFO L226 Difference]: Without dead ends: 6085 [2021-11-09 08:49:32,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=555, Invalid=7635, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 08:49:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-11-09 08:49:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5709. [2021-11-09 08:49:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5682 states have (on average 1.1520591341077087) internal successors, (6546), 5683 states have internal predecessors, (6546), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:49:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 6571 transitions. [2021-11-09 08:49:32,081 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 6571 transitions. Word has length 125 [2021-11-09 08:49:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:32,081 INFO L470 AbstractCegarLoop]: Abstraction has 5709 states and 6571 transitions. [2021-11-09 08:49:32,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.358490566037736) internal successors, (178), 52 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) [2021-11-09 08:49:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 6571 transitions. [2021-11-09 08:49:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-09 08:49:32,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:32,087 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 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] [2021-11-09 08:49:32,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:32,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:32,304 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:49:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash -563805041, now seen corresponding path program 17 times [2021-11-09 08:49:32,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:32,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186168031] [2021-11-09 08:49:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:32,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:49:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:32,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:32,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186168031] [2021-11-09 08:49:32,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186168031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:32,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793616486] [2021-11-09 08:49:32,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:49:32,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:32,870 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:32,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:49:35,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 08:49:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-09 08:49:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:35,808 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:49:35,808 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 [2021-11-09 08:49:35,811 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 [2021-11-09 08:49:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793616486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:37,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 49 [2021-11-09 08:49:37,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501424310] [2021-11-09 08:49:37,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 08:49:37,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 08:49:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:49:37,524 INFO L87 Difference]: Start difference. First operand 5709 states and 6571 transitions. Second operand has 50 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 47 states have internal predecessors, (240), 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) [2021-11-09 08:49:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:40,254 INFO L93 Difference]: Finished difference Result 6223 states and 7154 transitions. [2021-11-09 08:49:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:49:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 47 states have internal predecessors, (240), 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 126 [2021-11-09 08:49:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:40,278 INFO L225 Difference]: With dead ends: 6223 [2021-11-09 08:49:40,278 INFO L226 Difference]: Without dead ends: 6223 [2021-11-09 08:49:40,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=437, Invalid=4819, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:49:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2021-11-09 08:49:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 6200. [2021-11-09 08:49:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6200 states, 6173 states have (on average 1.152762028187267) internal successors, (7116), 6174 states have internal predecessors, (7116), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:49:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6200 states to 6200 states and 7141 transitions. [2021-11-09 08:49:40,333 INFO L78 Accepts]: Start accepts. Automaton has 6200 states and 7141 transitions. Word has length 126 [2021-11-09 08:49:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:40,333 INFO L470 AbstractCegarLoop]: Abstraction has 6200 states and 7141 transitions. [2021-11-09 08:49:40,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 47 states have internal predecessors, (240), 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) [2021-11-09 08:49:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6200 states and 7141 transitions. [2021-11-09 08:49:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 08:49:40,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:40,340 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:40,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:40,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:40,554 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:49:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1074341610, now seen corresponding path program 20 times [2021-11-09 08:49:40,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:40,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074010895] [2021-11-09 08:49:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:40,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:49:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:41,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:41,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074010895] [2021-11-09 08:49:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074010895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:41,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21736667] [2021-11-09 08:49:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:49:41,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:41,392 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:49:43,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:49:43,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-09 08:49:43,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:44,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21736667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:44,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:44,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 52 [2021-11-09 08:49:44,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137158973] [2021-11-09 08:49:44,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 08:49:44,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 08:49:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2433, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:49:44,940 INFO L87 Difference]: Start difference. First operand 6200 states and 7141 transitions. Second operand has 53 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 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) [2021-11-09 08:49:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:47,620 INFO L93 Difference]: Finished difference Result 6982 states and 7940 transitions. [2021-11-09 08:49:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:49:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 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 129 [2021-11-09 08:49:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:47,626 INFO L225 Difference]: With dead ends: 6982 [2021-11-09 08:49:47,626 INFO L226 Difference]: Without dead ends: 6982 [2021-11-09 08:49:47,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=520, Invalid=4450, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:49:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-11-09 08:49:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6295. [2021-11-09 08:49:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6295 states, 6268 states have (on average 1.1533184428844927) internal successors, (7229), 6269 states have internal predecessors, (7229), 24 states have call successors, (24), 24 states have call predecessors, (24), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:49:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 7254 transitions. [2021-11-09 08:49:47,699 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 7254 transitions. Word has length 129 [2021-11-09 08:49:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:47,699 INFO L470 AbstractCegarLoop]: Abstraction has 6295 states and 7254 transitions. [2021-11-09 08:49:47,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 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) [2021-11-09 08:49:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 7254 transitions. [2021-11-09 08:49:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-09 08:49:47,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:47,707 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:47,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 08:49:47,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:49:47,910 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:49:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1014924428, now seen corresponding path program 21 times [2021-11-09 08:49:47,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:47,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420474875] [2021-11-09 08:49:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:47,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:48,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:49:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:48,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:48,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420474875] [2021-11-09 08:49:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420474875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:48,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475270878] [2021-11-09 08:49:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:49:48,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:48,866 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:48,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:49:51,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-09 08:49:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:49:51,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 147 conjunts are in the unsatisfiable core [2021-11-09 08:49:51,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:49:52,406 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 [2021-11-09 08:49:52,954 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 [2021-11-09 08:49:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:52,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475270878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:52,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:52,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 58 [2021-11-09 08:49:52,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876652304] [2021-11-09 08:49:52,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 08:49:52,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 08:49:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3154, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:49:52,968 INFO L87 Difference]: Start difference. First operand 6295 states and 7254 transitions. Second operand has 58 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 55 states have internal predecessors, (191), 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) [2021-11-09 08:49:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:49:58,571 INFO L93 Difference]: Finished difference Result 8444 states and 9628 transitions. [2021-11-09 08:49:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 08:49:58,572 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 55 states have internal predecessors, (191), 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 134 [2021-11-09 08:49:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:49:58,580 INFO L225 Difference]: With dead ends: 8444 [2021-11-09 08:49:58,580 INFO L226 Difference]: Without dead ends: 7460 [2021-11-09 08:49:58,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=587, Invalid=8533, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 08:49:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-11-09 08:49:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7021. [2021-11-09 08:49:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7021 states, 6993 states have (on average 1.154869154869155) internal successors, (8076), 6994 states have internal predecessors, (8076), 25 states have call successors, (25), 25 states have call predecessors, (25), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:49:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7021 states to 7021 states and 8102 transitions. [2021-11-09 08:49:58,665 INFO L78 Accepts]: Start accepts. Automaton has 7021 states and 8102 transitions. Word has length 134 [2021-11-09 08:49:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:49:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 7021 states and 8102 transitions. [2021-11-09 08:49:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 55 states have internal predecessors, (191), 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) [2021-11-09 08:49:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7021 states and 8102 transitions. [2021-11-09 08:49:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-09 08:49:58,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:49:58,671 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:49:58,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-09 08:49:58,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:58,874 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:49:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:49:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash 775951163, now seen corresponding path program 18 times [2021-11-09 08:49:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:49:58,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781083916] [2021-11-09 08:49:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:49:58,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:49:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:49:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:49:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:59,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:49:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781083916] [2021-11-09 08:49:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781083916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456608280] [2021-11-09 08:49:59,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:49:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:49:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:49:59,765 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:49:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:50:02,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 08:50:02,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-09 08:50:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:02,564 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:50:02,564 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 [2021-11-09 08:50:04,073 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 27 treesize of output 23 [2021-11-09 08:50:04,194 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-11-09 08:50:04,194 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 43 treesize of output 42 [2021-11-09 08:50:10,862 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-11-09 08:50:10,862 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 76 treesize of output 54 [2021-11-09 08:50:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 268 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456608280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:10,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:10,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35] total 62 [2021-11-09 08:50:10,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672645500] [2021-11-09 08:50:10,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 08:50:10,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 08:50:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:50:10,889 INFO L87 Difference]: Start difference. First operand 7021 states and 8102 transitions. Second operand has 62 states, 61 states have (on average 4.081967213114754) internal successors, (249), 59 states have internal predecessors, (249), 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) [2021-11-09 08:50:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:28,214 INFO L93 Difference]: Finished difference Result 12884 states and 14786 transitions. [2021-11-09 08:50:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-09 08:50:28,214 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.081967213114754) internal successors, (249), 59 states have internal predecessors, (249), 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 134 [2021-11-09 08:50:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:28,227 INFO L225 Difference]: With dead ends: 12884 [2021-11-09 08:50:28,227 INFO L226 Difference]: Without dead ends: 7806 [2021-11-09 08:50:28,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5487 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1346, Invalid=20116, Unknown=0, NotChecked=0, Total=21462 [2021-11-09 08:50:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-11-09 08:50:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 7157. [2021-11-09 08:50:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7128 states have (on average 1.1541806958473626) internal successors, (8227), 7129 states have internal predecessors, (8227), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:50:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 8254 transitions. [2021-11-09 08:50:28,334 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 8254 transitions. Word has length 134 [2021-11-09 08:50:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:28,335 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 8254 transitions. [2021-11-09 08:50:28,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.081967213114754) internal successors, (249), 59 states have internal predecessors, (249), 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) [2021-11-09 08:50:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 8254 transitions. [2021-11-09 08:50:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 08:50:28,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:28,343 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:28,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 08:50:28,544 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:50:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash -422246231, now seen corresponding path program 22 times [2021-11-09 08:50:28,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:28,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761056835] [2021-11-09 08:50:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:28,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:50:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 231 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:29,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761056835] [2021-11-09 08:50:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761056835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927197481] [2021-11-09 08:50:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:50:29,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:29,670 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:29,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:50:33,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:50:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-09 08:50:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:33,213 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:50:33,213 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 [2021-11-09 08:50:33,943 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 [2021-11-09 08:50:35,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:50:35,842 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 21 treesize of output 21 [2021-11-09 08:50:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 288 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:36,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927197481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:36,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:36,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 60 [2021-11-09 08:50:36,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236145776] [2021-11-09 08:50:36,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 08:50:36,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 08:50:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3439, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:50:36,213 INFO L87 Difference]: Start difference. First operand 7157 states and 8254 transitions. Second operand has 61 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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) [2021-11-09 08:50:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:44,364 INFO L93 Difference]: Finished difference Result 8400 states and 9514 transitions. [2021-11-09 08:50:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 08:50:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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 138 [2021-11-09 08:50:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:44,373 INFO L225 Difference]: With dead ends: 8400 [2021-11-09 08:50:44,373 INFO L226 Difference]: Without dead ends: 8400 [2021-11-09 08:50:44,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=759, Invalid=10371, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:50:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-11-09 08:50:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 7257. [2021-11-09 08:50:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7257 states, 7228 states have (on average 1.1546762589928057) internal successors, (8346), 7229 states have internal predecessors, (8346), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:50:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 8373 transitions. [2021-11-09 08:50:44,475 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 8373 transitions. Word has length 138 [2021-11-09 08:50:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 7257 states and 8373 transitions. [2021-11-09 08:50:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 58 states have internal predecessors, (218), 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) [2021-11-09 08:50:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 8373 transitions. [2021-11-09 08:50:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 08:50:44,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:44,484 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:44,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:44,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 08:50:44,698 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:50:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1100436632, now seen corresponding path program 19 times [2021-11-09 08:50:44,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:44,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922468762] [2021-11-09 08:50:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:44,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:50:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:45,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:45,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922468762] [2021-11-09 08:50:45,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922468762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:45,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806307272] [2021-11-09 08:50:45,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:50:45,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:45,344 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:45,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:50:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-09 08:50:48,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 153 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806307272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:49,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:50:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 43 [2021-11-09 08:50:49,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779268143] [2021-11-09 08:50:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:50:49,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:50:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:50:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:50:49,792 INFO L87 Difference]: Start difference. First operand 7257 states and 8373 transitions. Second operand has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 41 states have internal predecessors, (184), 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) [2021-11-09 08:50:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:50:52,004 INFO L93 Difference]: Finished difference Result 7851 states and 9049 transitions. [2021-11-09 08:50:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:50:52,005 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 41 states have internal predecessors, (184), 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 138 [2021-11-09 08:50:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:50:52,013 INFO L225 Difference]: With dead ends: 7851 [2021-11-09 08:50:52,013 INFO L226 Difference]: Without dead ends: 7851 [2021-11-09 08:50:52,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=3165, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:50:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-11-09 08:50:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 7826. [2021-11-09 08:50:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7797 states have (on average 1.1553161472361164) internal successors, (9008), 7798 states have internal predecessors, (9008), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:50:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 9035 transitions. [2021-11-09 08:50:52,101 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 9035 transitions. Word has length 138 [2021-11-09 08:50:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:50:52,102 INFO L470 AbstractCegarLoop]: Abstraction has 7826 states and 9035 transitions. [2021-11-09 08:50:52,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 41 states have internal predecessors, (184), 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) [2021-11-09 08:50:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 9035 transitions. [2021-11-09 08:50:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 08:50:52,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:50:52,106 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:50:52,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 08:50:52,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 08:50:52,306 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:50:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:50:52,306 INFO L85 PathProgramCache]: Analyzing trace with hash -553772839, now seen corresponding path program 23 times [2021-11-09 08:50:52,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:50:52,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161526707] [2021-11-09 08:50:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:50:52,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:50:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:50:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:50:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:50:53,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:50:53,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161526707] [2021-11-09 08:50:53,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161526707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:50:53,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760311606] [2021-11-09 08:50:53,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:50:53,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:50:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:50:53,339 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:50:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:50:57,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-09 08:50:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:50:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-09 08:50:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:50:57,380 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:50:57,380 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 [2021-11-09 08:50:58,616 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 [2021-11-09 08:51:01,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:51:01,325 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 30 treesize of output 30 [2021-11-09 08:51:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 276 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:51:01,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760311606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:01,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:01,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 79 [2021-11-09 08:51:01,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735358468] [2021-11-09 08:51:01,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-09 08:51:01,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-09 08:51:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5894, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:51:01,724 INFO L87 Difference]: Start difference. First operand 7826 states and 9035 transitions. Second operand has 79 states, 77 states have (on average 3.5584415584415585) internal successors, (274), 76 states have internal predecessors, (274), 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) [2021-11-09 08:51:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:20,856 INFO L93 Difference]: Finished difference Result 11359 states and 12857 transitions. [2021-11-09 08:51:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-09 08:51:20,857 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 3.5584415584415585) internal successors, (274), 76 states have internal predecessors, (274), 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 143 [2021-11-09 08:51:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:20,863 INFO L225 Difference]: With dead ends: 11359 [2021-11-09 08:51:20,863 INFO L226 Difference]: Without dead ends: 10184 [2021-11-09 08:51:20,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8686 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1598, Invalid=29908, Unknown=0, NotChecked=0, Total=31506 [2021-11-09 08:51:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-11-09 08:51:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 8784. [2021-11-09 08:51:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8754 states have (on average 1.1571852867260681) internal successors, (10130), 8755 states have internal predecessors, (10130), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:51:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 10158 transitions. [2021-11-09 08:51:20,989 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 10158 transitions. Word has length 143 [2021-11-09 08:51:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 8784 states and 10158 transitions. [2021-11-09 08:51:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 3.5584415584415585) internal successors, (274), 76 states have internal predecessors, (274), 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) [2021-11-09 08:51:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 10158 transitions. [2021-11-09 08:51:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-09 08:51:20,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:20,993 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:51:21,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:21,193 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:51:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash -662025660, now seen corresponding path program 20 times [2021-11-09 08:51:21,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:21,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929028937] [2021-11-09 08:51:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:21,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:51:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:51:22,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:22,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929028937] [2021-11-09 08:51:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929028937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:22,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988895511] [2021-11-09 08:51:22,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:51:22,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:22,490 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:51:26,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:51:26,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-09 08:51:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:26,130 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 [2021-11-09 08:51:26,858 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 [2021-11-09 08:51:26,937 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-09 08:51:26,938 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 [2021-11-09 08:51:30,044 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 08:51:30,044 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 [2021-11-09 08:51:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:51:30,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988895511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:30,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:51:30,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 62 [2021-11-09 08:51:30,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982769671] [2021-11-09 08:51:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 08:51:30,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:51:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 08:51:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:51:30,068 INFO L87 Difference]: Start difference. First operand 8784 states and 10158 transitions. Second operand has 62 states, 61 states have (on average 4.459016393442623) internal successors, (272), 59 states have internal predecessors, (272), 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) [2021-11-09 08:53:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:05,383 INFO L93 Difference]: Finished difference Result 16046 states and 18483 transitions. [2021-11-09 08:53:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:53:05,384 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.459016393442623) internal successors, (272), 59 states have internal predecessors, (272), 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 146 [2021-11-09 08:53:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:05,392 INFO L225 Difference]: With dead ends: 16046 [2021-11-09 08:53:05,392 INFO L226 Difference]: Without dead ends: 9751 [2021-11-09 08:53:05,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=436, Invalid=8306, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 08:53:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9751 states. [2021-11-09 08:53:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9751 to 8934. [2021-11-09 08:53:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8934 states, 8903 states have (on average 1.156576434909581) internal successors, (10297), 8904 states have internal predecessors, (10297), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:53:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8934 states to 8934 states and 10326 transitions. [2021-11-09 08:53:05,514 INFO L78 Accepts]: Start accepts. Automaton has 8934 states and 10326 transitions. Word has length 146 [2021-11-09 08:53:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 8934 states and 10326 transitions. [2021-11-09 08:53:05,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.459016393442623) internal successors, (272), 59 states have internal predecessors, (272), 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) [2021-11-09 08:53:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8934 states and 10326 transitions. [2021-11-09 08:53:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-09 08:53:05,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:05,521 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:05,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 08:53:05,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:05,721 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:53:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1952356319, now seen corresponding path program 21 times [2021-11-09 08:53:05,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:05,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196387454] [2021-11-09 08:53:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:05,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:53:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 153 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:06,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:06,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196387454] [2021-11-09 08:53:06,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196387454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:06,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171748008] [2021-11-09 08:53:06,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:53:06,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:06,407 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 08:53:10,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:53:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 08:53:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 190 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:11,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171748008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:11,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:11,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 58 [2021-11-09 08:53:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232779059] [2021-11-09 08:53:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 08:53:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 08:53:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2993, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:53:11,670 INFO L87 Difference]: Start difference. First operand 8934 states and 10326 transitions. Second operand has 59 states, 58 states have (on average 4.9655172413793105) internal successors, (288), 56 states have internal predecessors, (288), 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) [2021-11-09 08:53:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:14,366 INFO L93 Difference]: Finished difference Result 9608 states and 11095 transitions. [2021-11-09 08:53:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 08:53:14,367 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.9655172413793105) internal successors, (288), 56 states have internal predecessors, (288), 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 150 [2021-11-09 08:53:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:14,374 INFO L225 Difference]: With dead ends: 9608 [2021-11-09 08:53:14,374 INFO L226 Difference]: Without dead ends: 9608 [2021-11-09 08:53:14,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=832, Invalid=6478, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 08:53:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-11-09 08:53:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9581. [2021-11-09 08:53:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9550 states have (on average 1.1571727748691099) internal successors, (11051), 9551 states have internal predecessors, (11051), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:53:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 11080 transitions. [2021-11-09 08:53:14,504 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 11080 transitions. Word has length 150 [2021-11-09 08:53:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:14,505 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 11080 transitions. [2021-11-09 08:53:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.9655172413793105) internal successors, (288), 56 states have internal predecessors, (288), 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) [2021-11-09 08:53:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 11080 transitions. [2021-11-09 08:53:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 08:53:14,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:14,509 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:14,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 08:53:14,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:14,710 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:53:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1684157446, now seen corresponding path program 24 times [2021-11-09 08:53:14,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:14,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477490689] [2021-11-09 08:53:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:14,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:15,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:53:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:15,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:15,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477490689] [2021-11-09 08:53:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477490689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:15,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540163701] [2021-11-09 08:53:15,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:53:15,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:15,767 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:15,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 08:53:19,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-09 08:53:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-09 08:53:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:20,851 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 [2021-11-09 08:53:21,461 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 [2021-11-09 08:53:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:21,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540163701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:21,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:21,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 40] total 64 [2021-11-09 08:53:21,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241200177] [2021-11-09 08:53:21,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 08:53:21,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 08:53:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3864, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:53:21,477 INFO L87 Difference]: Start difference. First operand 9581 states and 11080 transitions. Second operand has 64 states, 62 states have (on average 3.5) internal successors, (217), 61 states have internal predecessors, (217), 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) [2021-11-09 08:53:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:28,290 INFO L93 Difference]: Finished difference Result 12554 states and 14372 transitions. [2021-11-09 08:53:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 08:53:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 3.5) internal successors, (217), 61 states have internal predecessors, (217), 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 152 [2021-11-09 08:53:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:28,299 INFO L225 Difference]: With dead ends: 12554 [2021-11-09 08:53:28,299 INFO L226 Difference]: Without dead ends: 11172 [2021-11-09 08:53:28,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=651, Invalid=10479, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 08:53:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11172 states. [2021-11-09 08:53:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11172 to 10571. [2021-11-09 08:53:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10539 states have (on average 1.1585539424992883) internal successors, (12210), 10540 states have internal predecessors, (12210), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:53:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 12240 transitions. [2021-11-09 08:53:28,411 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 12240 transitions. Word has length 152 [2021-11-09 08:53:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:28,411 INFO L470 AbstractCegarLoop]: Abstraction has 10571 states and 12240 transitions. [2021-11-09 08:53:28,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 3.5) internal successors, (217), 61 states have internal predecessors, (217), 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) [2021-11-09 08:53:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 12240 transitions. [2021-11-09 08:53:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-09 08:53:28,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:28,417 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:28,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 08:53:28,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:28,618 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrcspnErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:53:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:28,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1947415837, now seen corresponding path program 25 times [2021-11-09 08:53:28,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:28,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977176591] [2021-11-09 08:53:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:28,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:29,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:53:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 325 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:29,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:29,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977176591] [2021-11-09 08:53:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977176591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:29,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710319241] [2021-11-09 08:53:29,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:53:29,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:29,780 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:29,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 08:53:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:33,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-09 08:53:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:34,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710319241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:34,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:34,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 61 [2021-11-09 08:53:34,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478306727] [2021-11-09 08:53:34,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 08:53:34,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 08:53:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=3321, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 08:53:34,674 INFO L87 Difference]: Start difference. First operand 10571 states and 12240 transitions. Second operand has 62 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 59 states have internal predecessors, (225), 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) [2021-11-09 08:53:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:53:38,241 INFO L93 Difference]: Finished difference Result 11723 states and 13413 transitions. [2021-11-09 08:53:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:53:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 59 states have internal predecessors, (225), 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 156 [2021-11-09 08:53:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:53:38,251 INFO L225 Difference]: With dead ends: 11723 [2021-11-09 08:53:38,251 INFO L226 Difference]: Without dead ends: 11723 [2021-11-09 08:53:38,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=694, Invalid=6112, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:53:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11723 states. [2021-11-09 08:53:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11723 to 10686. [2021-11-09 08:53:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10654 states have (on average 1.1589074525999625) internal successors, (12347), 10655 states have internal predecessors, (12347), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:53:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 12377 transitions. [2021-11-09 08:53:38,376 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 12377 transitions. Word has length 156 [2021-11-09 08:53:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:53:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 10686 states and 12377 transitions. [2021-11-09 08:53:38,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 59 states have internal predecessors, (225), 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) [2021-11-09 08:53:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 12377 transitions. [2021-11-09 08:53:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 08:53:38,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:53:38,381 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:53:38,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 08:53:38,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:38,583 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 8 more)] === [2021-11-09 08:53:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:53:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -445594419, now seen corresponding path program 22 times [2021-11-09 08:53:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:53:38,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149481050] [2021-11-09 08:53:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:53:38,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:53:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:39,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:53:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:53:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 24 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:39,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:53:39,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149481050] [2021-11-09 08:53:39,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149481050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:39,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764120348] [2021-11-09 08:53:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:53:39,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:53:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:53:39,645 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:53:39,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92c4458d-8125-4d63-9922-5839416f9e7a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process