./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF --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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:48:26,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:48:26,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:48:26,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:48:26,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:48:26,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:48:26,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:48:26,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:48:26,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:48:26,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:48:26,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:48:26,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:48:26,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:48:26,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:48:26,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:48:26,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:48:26,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:48:26,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:48:26,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:48:26,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:48:26,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:48:26,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:48:26,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:48:27,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:48:27,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:48:27,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:48:27,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:48:27,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:48:27,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:48:27,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:48:27,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:48:27,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:48:27,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:48:27,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:48:27,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:48:27,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:48:27,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:48:27,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:48:27,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:48:27,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:48:27,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:48:27,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:48:27,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:48:27,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:48:27,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:48:27,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:48:27,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:48:27,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:48:27,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:48:27,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:48:27,105 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:48:27,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:48:27,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:48:27,107 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:48:27,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:48:27,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:48:27,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:48:27,109 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:48:27,109 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:48:27,109 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:48:27,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:48:27,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:48:27,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:48:27,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:48:27,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:48:27,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:48:27,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:48:27,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:48:27,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:48:27,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:48:27,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:48:27,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:48:27,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:48:27,115 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_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-11-20 05:48:27,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:48:27,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:48:27,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:48:27,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:48:27,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:48:27,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-20 05:48:27,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/data/e202aa855/235595b1050c4823a0ea223407a37dae/FLAGbf38c492e [2021-11-20 05:48:28,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:48:28,528 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-20 05:48:28,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/data/e202aa855/235595b1050c4823a0ea223407a37dae/FLAGbf38c492e [2021-11-20 05:48:28,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/data/e202aa855/235595b1050c4823a0ea223407a37dae [2021-11-20 05:48:28,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:48:28,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:48:28,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:48:28,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:48:28,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:48:28,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:48:28" (1/1) ... [2021-11-20 05:48:28,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d395734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:28, skipping insertion in model container [2021-11-20 05:48:28,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:48:28" (1/1) ... [2021-11-20 05:48:28,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:48:28,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:48:29,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-20 05:48:29,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:48:29,420 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:48:29,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-20 05:48:29,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:48:29,554 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:48:29,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29 WrapperNode [2021-11-20 05:48:29,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:48:29,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:48:29,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:48:29,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:48:29,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,662 INFO L137 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2021-11-20 05:48:29,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:48:29,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:48:29,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:48:29,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:48:29,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:48:29,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:48:29,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:48:29,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:48:29,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (1/1) ... [2021-11-20 05:48:29,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:48:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:29,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:48:29,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:48:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-11-20 05:48:29,871 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-11-20 05:48:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:48:29,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:48:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:48:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:48:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:48:29,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:48:29,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:48:29,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:48:29,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:48:29,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:48:29,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:48:30,086 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:48:30,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:48:30,574 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:48:30,584 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:48:30,584 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:48:30,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:48:30 BoogieIcfgContainer [2021-11-20 05:48:30,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:48:30,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:48:30,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:48:30,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:48:30,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:48:28" (1/3) ... [2021-11-20 05:48:30,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62754a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:48:30, skipping insertion in model container [2021-11-20 05:48:30,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:48:29" (2/3) ... [2021-11-20 05:48:30,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62754a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:48:30, skipping insertion in model container [2021-11-20 05:48:30,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:48:30" (3/3) ... [2021-11-20 05:48:30,599 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-11-20 05:48:30,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:48:30,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-11-20 05:48:30,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:48:30,708 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 [2021-11-20 05:48:30,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-11-20 05:48:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:48:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 05:48:30,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:30,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 05:48:30,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-20 05:48:30,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:30,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510391634] [2021-11-20 05:48:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:30,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:31,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:31,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510391634] [2021-11-20 05:48:31,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510391634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:31,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:31,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:48:31,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279990657] [2021-11-20 05:48:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:31,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:31,145 INFO L87 Difference]: Start difference. First operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:31,332 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2021-11-20 05:48:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-20 05:48:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:31,348 INFO L225 Difference]: With dead ends: 106 [2021-11-20 05:48:31,349 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 05:48:31,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:31,357 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:31,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 05:48:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-20 05:48:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 95 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:48:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-20 05:48:31,438 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 3 [2021-11-20 05:48:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:31,439 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-20 05:48:31,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-20 05:48:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 05:48:31,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:31,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 05:48:31,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:48:31,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-20 05:48:31,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373534168] [2021-11-20 05:48:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:31,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:31,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373534168] [2021-11-20 05:48:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373534168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:31,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:31,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:48:31,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328356643] [2021-11-20 05:48:31,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:31,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:31,554 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:31,717 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-11-20 05:48:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-20 05:48:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:31,722 INFO L225 Difference]: With dead ends: 102 [2021-11-20 05:48:31,723 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 05:48:31,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:31,731 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:31,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 92 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 05:48:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-20 05:48:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:48:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-11-20 05:48:31,765 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 3 [2021-11-20 05:48:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:31,767 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-11-20 05:48:31,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-11-20 05:48:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:48:31,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:31,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:31,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:48:31,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2021-11-20 05:48:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898965101] [2021-11-20 05:48:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:31,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:31,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:31,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898965101] [2021-11-20 05:48:31,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898965101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:31,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:31,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:48:31,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852921388] [2021-11-20 05:48:31,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:31,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:31,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:31,896 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:32,108 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2021-11-20 05:48:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:48:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:32,116 INFO L225 Difference]: With dead ends: 165 [2021-11-20 05:48:32,116 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 05:48:32,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:32,127 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 74 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:32,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 213 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 05:48:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 100. [2021-11-20 05:48:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:48:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-11-20 05:48:32,158 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 8 [2021-11-20 05:48:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:32,159 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-11-20 05:48:32,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-11-20 05:48:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:48:32,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:32,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:32,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:48:32,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2021-11-20 05:48:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:32,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804465237] [2021-11-20 05:48:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:32,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:32,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804465237] [2021-11-20 05:48:32,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804465237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:32,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:32,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:48:32,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772676172] [2021-11-20 05:48:32,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:32,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:32,290 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:32,489 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2021-11-20 05:48:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 05:48:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:32,492 INFO L225 Difference]: With dead ends: 165 [2021-11-20 05:48:32,493 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 05:48:32,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:32,503 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:32,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 217 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 05:48:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 98. [2021-11-20 05:48:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:48:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-20 05:48:32,526 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 8 [2021-11-20 05:48:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:32,527 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-20 05:48:32,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-20 05:48:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:48:32,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:32,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:32,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:48:32,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1124238034, now seen corresponding path program 1 times [2021-11-20 05:48:32,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:32,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480418767] [2021-11-20 05:48:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:32,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480418767] [2021-11-20 05:48:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480418767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:32,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:32,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:32,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502201320] [2021-11-20 05:48:32,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:32,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:32,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:32,681 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:32,801 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-11-20 05:48:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:48:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:32,805 INFO L225 Difference]: With dead ends: 176 [2021-11-20 05:48:32,806 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 05:48:32,806 INFO L932 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 [2021-11-20 05:48:32,807 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 78 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:32,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 414 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 05:48:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2021-11-20 05:48:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.89247311827957) internal successors, (176), 129 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:48:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-11-20 05:48:32,845 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 10 [2021-11-20 05:48:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:32,845 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-11-20 05:48:32,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-11-20 05:48:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:48:32,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:32,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:32,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:48:32,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1121620373, now seen corresponding path program 1 times [2021-11-20 05:48:32,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041847332] [2021-11-20 05:48:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:32,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:32,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041847332] [2021-11-20 05:48:32,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041847332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:32,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:32,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:48:32,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742140326] [2021-11-20 05:48:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:32,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:48:32,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:48:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:48:32,976 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:33,132 INFO L93 Difference]: Finished difference Result 141 states and 194 transitions. [2021-11-20 05:48:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:48:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:48:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:33,135 INFO L225 Difference]: With dead ends: 141 [2021-11-20 05:48:33,135 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 05:48:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:33,137 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 143 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:33,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 105 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 05:48:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-20 05:48:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.8709677419354838) internal successors, (174), 128 states have internal predecessors, (174), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:48:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-11-20 05:48:33,147 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 10 [2021-11-20 05:48:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:33,148 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-11-20 05:48:33,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-11-20 05:48:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:48:33,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:33,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:33,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:48:33,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1121620372, now seen corresponding path program 1 times [2021-11-20 05:48:33,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:33,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196618714] [2021-11-20 05:48:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:33,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:33,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196618714] [2021-11-20 05:48:33,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196618714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:33,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:48:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475338751] [2021-11-20 05:48:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:33,239 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:33,377 INFO L93 Difference]: Finished difference Result 140 states and 192 transitions. [2021-11-20 05:48:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:48:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 05:48:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:33,379 INFO L225 Difference]: With dead ends: 140 [2021-11-20 05:48:33,380 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 05:48:33,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:33,381 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 143 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:33,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 120 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 05:48:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-20 05:48:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.8494623655913978) internal successors, (172), 127 states have internal predecessors, (172), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:48:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2021-11-20 05:48:33,391 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 10 [2021-11-20 05:48:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:33,392 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2021-11-20 05:48:33,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2021-11-20 05:48:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:48:33,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:33,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:33,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:48:33,394 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990355, now seen corresponding path program 1 times [2021-11-20 05:48:33,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134749912] [2021-11-20 05:48:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:33,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:33,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:33,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134749912] [2021-11-20 05:48:33,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134749912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:33,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:33,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:33,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696336368] [2021-11-20 05:48:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:48:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:48:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:33,474 INFO L87 Difference]: Start difference. First operand 140 states and 192 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:33,778 INFO L93 Difference]: Finished difference Result 159 states and 184 transitions. [2021-11-20 05:48:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:33,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 05:48:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:33,782 INFO L225 Difference]: With dead ends: 159 [2021-11-20 05:48:33,786 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 05:48:33,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:48:33,789 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 299 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:33,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 156 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:48:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 05:48:33,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2021-11-20 05:48:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.7311827956989247) internal successors, (161), 122 states have internal predecessors, (161), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:48:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 181 transitions. [2021-11-20 05:48:33,801 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 181 transitions. Word has length 15 [2021-11-20 05:48:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:33,805 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 181 transitions. [2021-11-20 05:48:33,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 181 transitions. [2021-11-20 05:48:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:48:33,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:33,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:33,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:48:33,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1910990356, now seen corresponding path program 1 times [2021-11-20 05:48:33,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:33,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645821426] [2021-11-20 05:48:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:33,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:33,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:34,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645821426] [2021-11-20 05:48:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645821426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:34,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:34,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:34,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729026393] [2021-11-20 05:48:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:34,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:48:34,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:48:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:34,005 INFO L87 Difference]: Start difference. First operand 135 states and 181 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:34,335 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2021-11-20 05:48:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 05:48:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:34,338 INFO L225 Difference]: With dead ends: 155 [2021-11-20 05:48:34,338 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 05:48:34,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:48:34,339 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 288 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 186 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:48:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 05:48:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2021-11-20 05:48:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 122 states have internal predecessors, (155), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:48:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2021-11-20 05:48:34,348 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 15 [2021-11-20 05:48:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:34,348 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2021-11-20 05:48:34,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2021-11-20 05:48:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:48:34,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:34,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:34,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:48:34,350 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148901, now seen corresponding path program 1 times [2021-11-20 05:48:34,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:34,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543655324] [2021-11-20 05:48:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:34,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:34,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543655324] [2021-11-20 05:48:34,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543655324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634220980] [2021-11-20 05:48:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:34,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:34,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:34,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:34,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:48:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 05:48:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:34,674 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:34,806 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:48:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-20 05:48:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:35,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:48:35,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634220980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:35,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:48:35,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-11-20 05:48:35,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099962976] [2021-11-20 05:48:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:35,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:48:35,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:48:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:48:35,128 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:35,680 INFO L93 Difference]: Finished difference Result 193 states and 248 transitions. [2021-11-20 05:48:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:48:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 05:48:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:35,683 INFO L225 Difference]: With dead ends: 193 [2021-11-20 05:48:35,684 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 05:48:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:48:35,685 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 133 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:35,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 374 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 350 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2021-11-20 05:48:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 05:48:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2021-11-20 05:48:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 97 states have (on average 1.6597938144329898) internal successors, (161), 126 states have internal predecessors, (161), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 05:48:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 184 transitions. [2021-11-20 05:48:35,699 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 184 transitions. Word has length 16 [2021-11-20 05:48:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:35,700 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 184 transitions. [2021-11-20 05:48:35,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 184 transitions. [2021-11-20 05:48:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:48:35,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:35,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:35,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 05:48:35,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:48:35,920 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1007148902, now seen corresponding path program 1 times [2021-11-20 05:48:35,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:35,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885064108] [2021-11-20 05:48:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:35,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:36,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:36,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885064108] [2021-11-20 05:48:36,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885064108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842992671] [2021-11-20 05:48:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:36,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:36,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:36,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:48:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 05:48:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:36,206 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:36,299 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:48:36,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-20 05:48:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:36,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:48:36,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842992671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:36,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:48:36,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-11-20 05:48:36,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634493445] [2021-11-20 05:48:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:36,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:48:36,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:48:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:48:36,642 INFO L87 Difference]: Start difference. First operand 140 states and 184 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:37,184 INFO L93 Difference]: Finished difference Result 193 states and 247 transitions. [2021-11-20 05:48:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:48:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 05:48:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:37,191 INFO L225 Difference]: With dead ends: 193 [2021-11-20 05:48:37,192 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 05:48:37,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:48:37,193 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 188 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:37,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 351 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 342 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2021-11-20 05:48:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 05:48:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2021-11-20 05:48:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 97 states have (on average 1.6494845360824741) internal successors, (160), 126 states have internal predecessors, (160), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 05:48:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2021-11-20 05:48:37,210 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 16 [2021-11-20 05:48:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2021-11-20 05:48:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2021-11-20 05:48:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:48:37,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:37,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:37,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:37,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:37,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting is_list_containing_xErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1502456102, now seen corresponding path program 1 times [2021-11-20 05:48:37,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:37,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470256636] [2021-11-20 05:48:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:37,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:48:37,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470256636] [2021-11-20 05:48:37,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470256636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:37,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:48:37,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763132795] [2021-11-20 05:48:37,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:37,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:37,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:37,494 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:37,577 INFO L93 Difference]: Finished difference Result 141 states and 184 transitions. [2021-11-20 05:48:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 05:48:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:37,581 INFO L225 Difference]: With dead ends: 141 [2021-11-20 05:48:37,582 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 05:48:37,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:37,584 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:37,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 163 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 05:48:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-20 05:48:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.6326530612244898) internal successors, (160), 127 states have internal predecessors, (160), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-20 05:48:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2021-11-20 05:48:37,602 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 18 [2021-11-20 05:48:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:37,604 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2021-11-20 05:48:37,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2021-11-20 05:48:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:48:37,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:37,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:48:37,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting is_list_containing_xErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1502456103, now seen corresponding path program 1 times [2021-11-20 05:48:37,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314839566] [2021-11-20 05:48:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:37,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:48:37,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314839566] [2021-11-20 05:48:37,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314839566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:37,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:37,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:37,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112683594] [2021-11-20 05:48:37,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:37,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:48:37,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:48:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:37,719 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:37,812 INFO L93 Difference]: Finished difference Result 147 states and 192 transitions. [2021-11-20 05:48:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 05:48:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:37,815 INFO L225 Difference]: With dead ends: 147 [2021-11-20 05:48:37,815 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 05:48:37,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:48:37,817 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 80 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:37,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 295 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:48:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 05:48:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-11-20 05:48:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.63) internal successors, (163), 128 states have internal predecessors, (163), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 05:48:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2021-11-20 05:48:37,828 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 18 [2021-11-20 05:48:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:37,828 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2021-11-20 05:48:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2021-11-20 05:48:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:48:37,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:37,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:37,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:48:37,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -992190633, now seen corresponding path program 1 times [2021-11-20 05:48:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645927434] [2021-11-20 05:48:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:37,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:38,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645927434] [2021-11-20 05:48:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645927434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:38,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:38,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:48:38,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488630230] [2021-11-20 05:48:38,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:38,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:48:38,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:48:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:48:38,027 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:38,327 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2021-11-20 05:48:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:48:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-20 05:48:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:38,330 INFO L225 Difference]: With dead ends: 191 [2021-11-20 05:48:38,330 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 05:48:38,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:48:38,332 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 229 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:38,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 386 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 05:48:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 151. [2021-11-20 05:48:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 107 states have (on average 1.6074766355140186) internal successors, (172), 135 states have internal predecessors, (172), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 05:48:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 196 transitions. [2021-11-20 05:48:38,352 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 196 transitions. Word has length 19 [2021-11-20 05:48:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:38,353 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 196 transitions. [2021-11-20 05:48:38,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 196 transitions. [2021-11-20 05:48:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:48:38,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:38,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:38,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:48:38,355 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 343557913, now seen corresponding path program 1 times [2021-11-20 05:48:38,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834076712] [2021-11-20 05:48:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:38,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:38,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:38,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:38,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834076712] [2021-11-20 05:48:38,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834076712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:38,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:38,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:48:38,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759186725] [2021-11-20 05:48:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:38,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:48:38,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:48:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:48:38,516 INFO L87 Difference]: Start difference. First operand 151 states and 196 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:38,750 INFO L93 Difference]: Finished difference Result 186 states and 237 transitions. [2021-11-20 05:48:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:48:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-20 05:48:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:38,753 INFO L225 Difference]: With dead ends: 186 [2021-11-20 05:48:38,753 INFO L226 Difference]: Without dead ends: 186 [2021-11-20 05:48:38,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:48:38,754 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 102 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:38,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 400 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-20 05:48:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 153. [2021-11-20 05:48:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.5963302752293578) internal successors, (174), 137 states have internal predecessors, (174), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 05:48:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2021-11-20 05:48:38,768 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 21 [2021-11-20 05:48:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2021-11-20 05:48:38,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2021-11-20 05:48:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 05:48:38,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:38,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:48:38,771 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 451808416, now seen corresponding path program 1 times [2021-11-20 05:48:38,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947381842] [2021-11-20 05:48:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:38,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:39,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:39,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947381842] [2021-11-20 05:48:39,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947381842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:39,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214567744] [2021-11-20 05:48:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:39,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:39,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:39,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:48:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 05:48:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:39,178 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 05:48:39,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-20 05:48:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:39,519 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 42 treesize of output 36 [2021-11-20 05:48:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:39,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214567744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:39,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:39,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 20 [2021-11-20 05:48:39,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794719807] [2021-11-20 05:48:39,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:39,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:48:39,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:48:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:48:39,778 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:42,164 INFO L93 Difference]: Finished difference Result 501 states and 657 transitions. [2021-11-20 05:48:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:48:42,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 05:48:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:42,171 INFO L225 Difference]: With dead ends: 501 [2021-11-20 05:48:42,171 INFO L226 Difference]: Without dead ends: 501 [2021-11-20 05:48:42,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:48:42,173 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 967 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:42,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1567 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1621 Invalid, 0 Unknown, 112 Unchecked, 1.7s Time] [2021-11-20 05:48:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-20 05:48:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 238. [2021-11-20 05:48:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 176 states have (on average 1.5909090909090908) internal successors, (280), 207 states have internal predecessors, (280), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-20 05:48:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 330 transitions. [2021-11-20 05:48:42,197 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 330 transitions. Word has length 22 [2021-11-20 05:48:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:42,198 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 330 transitions. [2021-11-20 05:48:42,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 330 transitions. [2021-11-20 05:48:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:48:42,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:42,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:42,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:42,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:48:42,424 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1286860128, now seen corresponding path program 1 times [2021-11-20 05:48:42,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:42,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008532856] [2021-11-20 05:48:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:42,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:42,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:42,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008532856] [2021-11-20 05:48:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008532856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413141015] [2021-11-20 05:48:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:42,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:42,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:42,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:48:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:48:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:42,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:42,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413141015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:42,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:42,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-20 05:48:42,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763502198] [2021-11-20 05:48:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:48:42,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:48:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:48:42,948 INFO L87 Difference]: Start difference. First operand 238 states and 330 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:48:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:43,702 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2021-11-20 05:48:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:48:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-11-20 05:48:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:43,716 INFO L225 Difference]: With dead ends: 306 [2021-11-20 05:48:43,717 INFO L226 Difference]: Without dead ends: 300 [2021-11-20 05:48:43,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:48:43,718 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 338 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:43,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 723 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:48:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-20 05:48:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 238. [2021-11-20 05:48:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 176 states have (on average 1.5738636363636365) internal successors, (277), 207 states have internal predecessors, (277), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-20 05:48:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 327 transitions. [2021-11-20 05:48:43,747 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 327 transitions. Word has length 21 [2021-11-20 05:48:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:43,747 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 327 transitions. [2021-11-20 05:48:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:48:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 327 transitions. [2021-11-20 05:48:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:48:43,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:43,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:43,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:43,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:48:43,957 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1821114983, now seen corresponding path program 1 times [2021-11-20 05:48:43,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:43,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663523111] [2021-11-20 05:48:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:43,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:44,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663523111] [2021-11-20 05:48:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663523111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:44,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:44,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:44,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487574545] [2021-11-20 05:48:44,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:44,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:44,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:44,026 INFO L87 Difference]: Start difference. First operand 238 states and 327 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 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) [2021-11-20 05:48:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:44,059 INFO L93 Difference]: Finished difference Result 252 states and 345 transitions. [2021-11-20 05:48:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 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 24 [2021-11-20 05:48:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:44,064 INFO L225 Difference]: With dead ends: 252 [2021-11-20 05:48:44,065 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 05:48:44,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:44,066 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 6 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:44,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 395 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:48:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 05:48:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2021-11-20 05:48:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 215 states have internal predecessors, (280), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 05:48:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 340 transitions. [2021-11-20 05:48:44,093 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 340 transitions. Word has length 24 [2021-11-20 05:48:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 340 transitions. [2021-11-20 05:48:44,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 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) [2021-11-20 05:48:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 340 transitions. [2021-11-20 05:48:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:48:44,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:44,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:44,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 05:48:44,097 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275188, now seen corresponding path program 1 times [2021-11-20 05:48:44,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:44,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992368726] [2021-11-20 05:48:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:44,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:44,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992368726] [2021-11-20 05:48:44,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992368726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:44,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:44,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:48:44,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336594827] [2021-11-20 05:48:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:44,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:44,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:44,185 INFO L87 Difference]: Start difference. First operand 247 states and 340 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:44,515 INFO L93 Difference]: Finished difference Result 305 states and 391 transitions. [2021-11-20 05:48:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:48:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-20 05:48:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:44,518 INFO L225 Difference]: With dead ends: 305 [2021-11-20 05:48:44,519 INFO L226 Difference]: Without dead ends: 305 [2021-11-20 05:48:44,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:48:44,520 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 206 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:44,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 259 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:48:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-20 05:48:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 246. [2021-11-20 05:48:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 179 states have (on average 1.553072625698324) internal successors, (278), 214 states have internal predecessors, (278), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 05:48:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2021-11-20 05:48:44,535 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 23 [2021-11-20 05:48:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:44,535 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2021-11-20 05:48:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2021-11-20 05:48:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:48:44,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:44,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:44,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 05:48:44,540 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1983275187, now seen corresponding path program 1 times [2021-11-20 05:48:44,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:44,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082607054] [2021-11-20 05:48:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:44,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:44,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:44,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082607054] [2021-11-20 05:48:44,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082607054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:44,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:44,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:48:44,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218673822] [2021-11-20 05:48:44,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:44,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:44,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:44,666 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:44,949 INFO L93 Difference]: Finished difference Result 303 states and 384 transitions. [2021-11-20 05:48:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:48:44,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-20 05:48:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:44,952 INFO L225 Difference]: With dead ends: 303 [2021-11-20 05:48:44,952 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 05:48:44,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:48:44,953 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 194 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:44,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 353 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 05:48:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 240. [2021-11-20 05:48:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 179 states have (on average 1.5027932960893855) internal successors, (269), 208 states have internal predecessors, (269), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 05:48:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 329 transitions. [2021-11-20 05:48:44,967 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 329 transitions. Word has length 23 [2021-11-20 05:48:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 329 transitions. [2021-11-20 05:48:44,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 329 transitions. [2021-11-20 05:48:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:48:44,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:44,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:44,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 05:48:44,970 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398490, now seen corresponding path program 1 times [2021-11-20 05:48:44,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232123506] [2021-11-20 05:48:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:44,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:45,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:45,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:45,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232123506] [2021-11-20 05:48:45,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232123506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963270373] [2021-11-20 05:48:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:45,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:45,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:45,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:45,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:48:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 05:48:45,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:45,816 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:45,891 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 19 treesize of output 15 [2021-11-20 05:48:46,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-20 05:48:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:46,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:46,158 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 42 treesize of output 36 [2021-11-20 05:48:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:46,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963270373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:46,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:46,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 6] total 21 [2021-11-20 05:48:46,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877554593] [2021-11-20 05:48:46,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:46,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:48:46,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:48:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:48:46,329 INFO L87 Difference]: Start difference. First operand 240 states and 329 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:48:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:49,043 INFO L93 Difference]: Finished difference Result 467 states and 575 transitions. [2021-11-20 05:48:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:48:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-20 05:48:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:49,048 INFO L225 Difference]: With dead ends: 467 [2021-11-20 05:48:49,048 INFO L226 Difference]: Without dead ends: 467 [2021-11-20 05:48:49,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:48:49,050 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 797 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:49,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1319 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1068 Invalid, 0 Unknown, 261 Unchecked, 1.3s Time] [2021-11-20 05:48:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-20 05:48:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 245. [2021-11-20 05:48:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 182 states have (on average 1.489010989010989) internal successors, (271), 212 states have internal predecessors, (271), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 21 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 05:48:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 333 transitions. [2021-11-20 05:48:49,068 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 333 transitions. Word has length 25 [2021-11-20 05:48:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:49,068 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 333 transitions. [2021-11-20 05:48:49,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:48:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 333 transitions. [2021-11-20 05:48:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:48:49,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:49,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:49,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:49,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:49,276 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2147398489, now seen corresponding path program 1 times [2021-11-20 05:48:49,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203492138] [2021-11-20 05:48:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:49,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:49,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:49,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203492138] [2021-11-20 05:48:49,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203492138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761201503] [2021-11-20 05:48:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:49,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:49,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:49,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:49,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:48:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:50,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:48:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:50,132 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:50,287 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 38 treesize of output 34 [2021-11-20 05:48:50,303 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 31 treesize of output 27 [2021-11-20 05:48:50,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:48:50,832 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 45 treesize of output 45 [2021-11-20 05:48:50,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:48:50,843 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 42 treesize of output 42 [2021-11-20 05:48:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761201503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:51,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:48:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-11-20 05:48:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737957722] [2021-11-20 05:48:51,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:48:51,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:48:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:48:51,431 INFO L87 Difference]: Start difference. First operand 245 states and 333 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:53,565 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2021-11-20 05:48:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:48:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 05:48:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:53,575 INFO L225 Difference]: With dead ends: 424 [2021-11-20 05:48:53,575 INFO L226 Difference]: Without dead ends: 424 [2021-11-20 05:48:53,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:48:53,577 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 444 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:53,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 1320 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 773 Invalid, 0 Unknown, 457 Unchecked, 0.9s Time] [2021-11-20 05:48:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-20 05:48:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 253. [2021-11-20 05:48:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 190 states have (on average 1.4736842105263157) internal successors, (280), 219 states have internal predecessors, (280), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 22 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 05:48:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 342 transitions. [2021-11-20 05:48:53,601 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 342 transitions. Word has length 25 [2021-11-20 05:48:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:53,602 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 342 transitions. [2021-11-20 05:48:53,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 342 transitions. [2021-11-20 05:48:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:48:53,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:53,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:53,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:53,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:53,828 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361463, now seen corresponding path program 1 times [2021-11-20 05:48:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146072834] [2021-11-20 05:48:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:53,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:48:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:53,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146072834] [2021-11-20 05:48:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146072834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:53,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:53,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266800204] [2021-11-20 05:48:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:53,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:48:53,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:48:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:53,950 INFO L87 Difference]: Start difference. First operand 253 states and 342 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:54,186 INFO L93 Difference]: Finished difference Result 263 states and 334 transitions. [2021-11-20 05:48:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 05:48:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:54,189 INFO L225 Difference]: With dead ends: 263 [2021-11-20 05:48:54,190 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 05:48:54,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:48:54,191 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 203 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:54,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 186 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 05:48:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 250. [2021-11-20 05:48:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 190 states have (on average 1.4157894736842105) internal successors, (269), 216 states have internal predecessors, (269), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 22 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 05:48:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2021-11-20 05:48:54,206 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 27 [2021-11-20 05:48:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:54,206 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2021-11-20 05:48:54,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2021-11-20 05:48:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:48:54,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:54,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:54,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 05:48:54,209 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:54,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1195361464, now seen corresponding path program 1 times [2021-11-20 05:48:54,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:54,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906597188] [2021-11-20 05:48:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:54,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:48:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:48:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:54,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:54,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906597188] [2021-11-20 05:48:54,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906597188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:54,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:54,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:54,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096325379] [2021-11-20 05:48:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:54,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:48:54,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:48:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:54,298 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:54,580 INFO L93 Difference]: Finished difference Result 261 states and 329 transitions. [2021-11-20 05:48:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:48:54,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 05:48:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:54,583 INFO L225 Difference]: With dead ends: 261 [2021-11-20 05:48:54,584 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 05:48:54,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:48:54,585 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 174 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:54,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 212 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:48:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 05:48:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 250. [2021-11-20 05:48:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 190 states have (on average 1.3842105263157896) internal successors, (263), 216 states have internal predecessors, (263), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 22 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 05:48:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 325 transitions. [2021-11-20 05:48:54,600 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 325 transitions. Word has length 27 [2021-11-20 05:48:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:54,600 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 325 transitions. [2021-11-20 05:48:54,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:48:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 325 transitions. [2021-11-20 05:48:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:48:54,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:54,602 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:54,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 05:48:54,603 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash 468828336, now seen corresponding path program 1 times [2021-11-20 05:48:54,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646716798] [2021-11-20 05:48:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:54,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 05:48:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:48:54,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:54,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646716798] [2021-11-20 05:48:54,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646716798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:54,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:54,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:48:54,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133330144] [2021-11-20 05:48:54,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:54,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:48:54,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:54,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:48:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:54,639 INFO L87 Difference]: Start difference. First operand 250 states and 325 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:54,655 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-11-20 05:48:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:48:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-20 05:48:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:54,659 INFO L225 Difference]: With dead ends: 268 [2021-11-20 05:48:54,659 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 05:48:54,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:48:54,660 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 57 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:54,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 199 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:48:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 05:48:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 239. [2021-11-20 05:48:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 180 states have (on average 1.3722222222222222) internal successors, (247), 206 states have internal predecessors, (247), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 05:48:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 307 transitions. [2021-11-20 05:48:54,675 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 307 transitions. Word has length 26 [2021-11-20 05:48:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:54,676 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 307 transitions. [2021-11-20 05:48:54,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 307 transitions. [2021-11-20 05:48:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:48:54,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:54,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:54,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 05:48:54,678 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:54,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1109218320, now seen corresponding path program 1 times [2021-11-20 05:48:54,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:54,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806435984] [2021-11-20 05:48:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:54,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:48:54,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806435984] [2021-11-20 05:48:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806435984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:48:54,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:48:54,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:48:54,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727277336] [2021-11-20 05:48:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:48:54,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:48:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:48:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:48:54,769 INFO L87 Difference]: Start difference. First operand 239 states and 307 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:54,792 INFO L93 Difference]: Finished difference Result 253 states and 326 transitions. [2021-11-20 05:48:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:48:54,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-20 05:48:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:54,795 INFO L225 Difference]: With dead ends: 253 [2021-11-20 05:48:54,795 INFO L226 Difference]: Without dead ends: 249 [2021-11-20 05:48:54,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:48:54,796 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:54,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 378 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:48:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-20 05:48:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2021-11-20 05:48:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 182 states have (on average 1.3681318681318682) internal successors, (249), 210 states have internal predecessors, (249), 30 states have call successors, (30), 11 states have call predecessors, (30), 13 states have return successors, (34), 21 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-20 05:48:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2021-11-20 05:48:54,812 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 27 [2021-11-20 05:48:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2021-11-20 05:48:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:48:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2021-11-20 05:48:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:48:54,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:54,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:54,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 05:48:54,814 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:54,815 INFO L85 PathProgramCache]: Analyzing trace with hash -815173774, now seen corresponding path program 1 times [2021-11-20 05:48:54,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:54,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478750155] [2021-11-20 05:48:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:54,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:55,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:55,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478750155] [2021-11-20 05:48:55,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478750155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654792132] [2021-11-20 05:48:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:55,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:55,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:55,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:48:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:55,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:48:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:55,394 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:48:55,510 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 13 treesize of output 9 [2021-11-20 05:48:55,518 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 19 treesize of output 15 [2021-11-20 05:48:55,665 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 31 treesize of output 23 [2021-11-20 05:48:55,669 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 20 treesize of output 12 [2021-11-20 05:48:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:55,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:56,004 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 42 treesize of output 36 [2021-11-20 05:48:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:48:56,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654792132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:48:56,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:48:56,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 23 [2021-11-20 05:48:56,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390457745] [2021-11-20 05:48:56,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:48:56,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:48:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:48:56,221 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 24 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:57,434 INFO L93 Difference]: Finished difference Result 299 states and 381 transitions. [2021-11-20 05:48:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:48:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 05:48:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:57,438 INFO L225 Difference]: With dead ends: 299 [2021-11-20 05:48:57,438 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 05:48:57,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-11-20 05:48:57,439 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 380 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:57,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1023 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:48:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 05:48:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 242. [2021-11-20 05:48:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 182 states have (on average 1.3516483516483517) internal successors, (246), 209 states have internal predecessors, (246), 30 states have call successors, (30), 11 states have call predecessors, (30), 13 states have return successors, (34), 21 states have call predecessors, (34), 30 states have call successors, (34) [2021-11-20 05:48:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 310 transitions. [2021-11-20 05:48:57,455 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 310 transitions. Word has length 28 [2021-11-20 05:48:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:57,456 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 310 transitions. [2021-11-20 05:48:57,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:48:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 310 transitions. [2021-11-20 05:48:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:48:57,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:57,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:57,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 05:48:57,684 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:48:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1709630296, now seen corresponding path program 1 times [2021-11-20 05:48:57,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609938302] [2021-11-20 05:48:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:57,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:58,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:48:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:48:58,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609938302] [2021-11-20 05:48:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609938302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362076025] [2021-11-20 05:48:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:58,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:58,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:58,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:48:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:48:58,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 05:48:58,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:58,324 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 18 treesize of output 14 [2021-11-20 05:49:02,477 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 20 treesize of output 8 [2021-11-20 05:49:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:02,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:02,548 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 40 treesize of output 34 [2021-11-20 05:49:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362076025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:02,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:49:02,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 17 [2021-11-20 05:49:02,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66667077] [2021-11-20 05:49:02,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:02,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:49:02,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:49:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2021-11-20 05:49:02,611 INFO L87 Difference]: Start difference. First operand 242 states and 310 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:05,614 INFO L93 Difference]: Finished difference Result 319 states and 397 transitions. [2021-11-20 05:49:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:49:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-20 05:49:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:05,616 INFO L225 Difference]: With dead ends: 319 [2021-11-20 05:49:05,616 INFO L226 Difference]: Without dead ends: 319 [2021-11-20 05:49:05,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=149, Invalid=604, Unknown=3, NotChecked=0, Total=756 [2021-11-20 05:49:05,617 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 247 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:05,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 944 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2021-11-20 05:49:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-20 05:49:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 223. [2021-11-20 05:49:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 168 states have (on average 1.3511904761904763) internal successors, (227), 193 states have internal predecessors, (227), 26 states have call successors, (26), 10 states have call predecessors, (26), 12 states have return successors, (30), 19 states have call predecessors, (30), 26 states have call successors, (30) [2021-11-20 05:49:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2021-11-20 05:49:05,628 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 27 [2021-11-20 05:49:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2021-11-20 05:49:05,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2021-11-20 05:49:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:49:05,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:05,629 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:49:05,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:05,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:49:05,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:49:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1952238210, now seen corresponding path program 1 times [2021-11-20 05:49:05,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:05,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894640193] [2021-11-20 05:49:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:05,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:49:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:49:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:49:05,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894640193] [2021-11-20 05:49:05,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894640193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:05,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:05,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:49:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592406468] [2021-11-20 05:49:05,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:05,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:49:05,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:49:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:49:05,886 INFO L87 Difference]: Start difference. First operand 223 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:05,925 INFO L93 Difference]: Finished difference Result 231 states and 283 transitions. [2021-11-20 05:49:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:49:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 30 [2021-11-20 05:49:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:05,927 INFO L225 Difference]: With dead ends: 231 [2021-11-20 05:49:05,927 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 05:49:05,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:49:05,928 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 38 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:05,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 260 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:49:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 05:49:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-11-20 05:49:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 167 states have (on average 1.347305389221557) internal successors, (225), 191 states have internal predecessors, (225), 24 states have call successors, (24), 10 states have call predecessors, (24), 12 states have return successors, (28), 18 states have call predecessors, (28), 24 states have call successors, (28) [2021-11-20 05:49:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 277 transitions. [2021-11-20 05:49:05,939 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 277 transitions. Word has length 30 [2021-11-20 05:49:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:05,939 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 277 transitions. [2021-11-20 05:49:05,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 277 transitions. [2021-11-20 05:49:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:49:05,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:05,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:05,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 05:49:05,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:49:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1439567607, now seen corresponding path program 1 times [2021-11-20 05:49:05,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:05,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049519273] [2021-11-20 05:49:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:05,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:49:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:49:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:06,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:06,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049519273] [2021-11-20 05:49:06,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049519273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:06,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:06,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:49:06,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83484491] [2021-11-20 05:49:06,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:06,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:49:06,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:49:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:49:06,098 INFO L87 Difference]: Start difference. First operand 220 states and 277 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:06,312 INFO L93 Difference]: Finished difference Result 240 states and 300 transitions. [2021-11-20 05:49:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:49:06,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-20 05:49:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:06,314 INFO L225 Difference]: With dead ends: 240 [2021-11-20 05:49:06,314 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 05:49:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:06,316 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 110 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:06,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 356 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:49:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 05:49:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2021-11-20 05:49:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.3372093023255813) internal successors, (230), 196 states have internal predecessors, (230), 25 states have call successors, (25), 10 states have call predecessors, (25), 12 states have return successors, (29), 19 states have call predecessors, (29), 25 states have call successors, (29) [2021-11-20 05:49:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2021-11-20 05:49:06,327 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 30 [2021-11-20 05:49:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2021-11-20 05:49:06,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2021-11-20 05:49:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:49:06,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:06,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:06,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 05:49:06,330 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:49:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 453625093, now seen corresponding path program 1 times [2021-11-20 05:49:06,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:06,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889919895] [2021-11-20 05:49:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:06,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:49:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 05:49:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:06,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889919895] [2021-11-20 05:49:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889919895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:06,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:06,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:49:06,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884610312] [2021-11-20 05:49:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:06,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:49:06,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:49:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:49:06,431 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:06,667 INFO L93 Difference]: Finished difference Result 263 states and 330 transitions. [2021-11-20 05:49:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:49:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-11-20 05:49:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:06,670 INFO L225 Difference]: With dead ends: 263 [2021-11-20 05:49:06,671 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 05:49:06,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:06,672 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 347 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:49:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 05:49:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 245. [2021-11-20 05:49:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.3315508021390374) internal successors, (249), 212 states have internal predecessors, (249), 29 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (33), 22 states have call predecessors, (33), 29 states have call successors, (33) [2021-11-20 05:49:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 311 transitions. [2021-11-20 05:49:06,684 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 311 transitions. Word has length 32 [2021-11-20 05:49:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:06,684 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 311 transitions. [2021-11-20 05:49:06,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 311 transitions. [2021-11-20 05:49:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 05:49:06,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:06,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:06,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 05:49:06,686 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:49:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:06,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1579548114, now seen corresponding path program 1 times [2021-11-20 05:49:06,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852905123] [2021-11-20 05:49:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:07,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:49:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:07,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:07,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852905123] [2021-11-20 05:49:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852905123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831761737] [2021-11-20 05:49:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:07,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:07,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:49:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:49:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:07,356 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 11 treesize of output 7 [2021-11-20 05:49:07,364 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 11 treesize of output 7 [2021-11-20 05:49:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:49:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:49:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 05:49:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 05:49:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,813 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:49:07,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2021-11-20 05:49:07,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-20 05:49:07,985 INFO L354 Elim1Store]: treesize reduction 155, result has 13.4 percent of original size [2021-11-20 05:49:07,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 96 [2021-11-20 05:49:08,020 INFO L354 Elim1Store]: treesize reduction 164, result has 13.2 percent of original size [2021-11-20 05:49:08,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 86 treesize of output 87 [2021-11-20 05:49:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:49:08,965 INFO L354 Elim1Store]: treesize reduction 269, result has 18.7 percent of original size [2021-11-20 05:49:08,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 134 treesize of output 131 [2021-11-20 05:49:09,016 INFO L354 Elim1Store]: treesize reduction 188, result has 20.7 percent of original size [2021-11-20 05:49:09,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 135 [2021-11-20 05:49:09,235 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 05:49:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 71 [2021-11-20 05:49:09,243 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-20 05:49:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 33 [2021-11-20 05:49:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:09,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:10,675 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem4#1.offset| Int) (|ULTIMATE.start_remove_#t~mem5#1.base| Int)) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem4#1.base|) |ULTIMATE.start_remove_#t~mem4#1.offset| |ULTIMATE.start_remove_#t~mem5#1.base|)) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0)) (forall ((|ULTIMATE.start_remove_#t~mem5#1.offset| Int) (|ULTIMATE.start_remove_#t~mem4#1.offset| Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem4#1.base|) |ULTIMATE.start_remove_#t~mem4#1.offset| |ULTIMATE.start_remove_#t~mem5#1.offset|)) |c_ULTIMATE.start_remove_~x#1.base|) |c_ULTIMATE.start_remove_~x#1.offset|) 0))) is different from false [2021-11-20 05:49:21,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831761737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:21,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:21,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-11-20 05:49:21,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391016534] [2021-11-20 05:49:21,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:21,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:49:21,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:49:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:49:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=613, Unknown=1, NotChecked=50, Total=756 [2021-11-20 05:49:21,944 INFO L87 Difference]: Start difference. First operand 245 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:24,558 INFO L93 Difference]: Finished difference Result 347 states and 429 transitions. [2021-11-20 05:49:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:49:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-20 05:49:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:24,561 INFO L225 Difference]: With dead ends: 347 [2021-11-20 05:49:24,561 INFO L226 Difference]: Without dead ends: 347 [2021-11-20 05:49:24,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=339, Invalid=1826, Unknown=1, NotChecked=90, Total=2256 [2021-11-20 05:49:24,562 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 429 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:24,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 912 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 652 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2021-11-20 05:49:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-20 05:49:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 235. [2021-11-20 05:49:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 178 states have (on average 1.3258426966292134) internal successors, (236), 203 states have internal predecessors, (236), 28 states have call successors, (28), 10 states have call predecessors, (28), 12 states have return successors, (32), 21 states have call predecessors, (32), 28 states have call successors, (32) [2021-11-20 05:49:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 296 transitions. [2021-11-20 05:49:24,576 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 296 transitions. Word has length 31 [2021-11-20 05:49:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:24,576 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 296 transitions. [2021-11-20 05:49:24,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:49:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 296 transitions. [2021-11-20 05:49:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:24,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:24,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:24,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:24,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 05:49:24,800 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-20 05:49:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash -575773780, now seen corresponding path program 1 times [2021-11-20 05:49:24,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:49:24,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287155526] [2021-11-20 05:49:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:24,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:49:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:25,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287155526] [2021-11-20 05:49:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287155526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471209716] [2021-11-20 05:49:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:25,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:25,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:25,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ea36fc-fead-4f6a-8df2-d789ebdea316/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:49:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:49:25,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:25,517 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 13 treesize of output 9 [2021-11-20 05:49:25,523 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 13 treesize of output 9 [2021-11-20 05:49:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:49:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:25,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 05:49:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:25,787 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 05:49:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 05:49:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 05:49:25,939 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-20 05:49:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 91 [2021-11-20 05:49:26,020 INFO L354 Elim1Store]: treesize reduction 184, result has 18.6 percent of original size [2021-11-20 05:49:26,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 106 [2021-11-20 05:49:26,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:49:26,256 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 11 treesize of output 11 [2021-11-20 05:49:26,551 INFO L354 Elim1Store]: treesize reduction 170, result has 19.4 percent of original size [2021-11-20 05:49:26,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 140 treesize of output 150 [2021-11-20 05:49:26,619 INFO L354 Elim1Store]: treesize reduction 192, result has 19.0 percent of original size [2021-11-20 05:49:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 158 treesize of output 155 [2021-11-20 05:49:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:26,982 INFO L354 Elim1Store]: treesize reduction 212, result has 16.9 percent of original size [2021-11-20 05:49:26,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 205 [2021-11-20 05:49:26,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:49:27,055 INFO L354 Elim1Store]: treesize reduction 238, result has 15.9 percent of original size [2021-11-20 05:49:27,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 208 [2021-11-20 05:49:27,561 INFO L354 Elim1Store]: treesize reduction 370, result has 13.6 percent of original size [2021-11-20 05:49:27,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 433 treesize of output 294 [2021-11-20 05:49:27,712 INFO L354 Elim1Store]: treesize reduction 272, result has 16.6 percent of original size [2021-11-20 05:49:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 270 treesize of output 202 [2021-11-20 05:50:25,529 INFO L354 Elim1Store]: treesize reduction 189, result has 12.9 percent of original size [2021-11-20 05:50:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 217 treesize of output 145 [2021-11-20 05:50:25,580 INFO L354 Elim1Store]: treesize reduction 139, result has 16.8 percent of original size [2021-11-20 05:50:25,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 131 [2021-11-20 05:50:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 9 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:18,500 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 05:51:18,500 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 651 treesize of output 650 [2021-11-20 05:51:20,680 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~n~0#1.base_20| Int)) (let ((.cse7 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4))) (let ((.cse4 (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |c_ULTIMATE.start_main_~n~0#1.offset|)))) (store .cse10 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse10 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.offset|) 4 0))))) (store .cse9 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse9 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 0)))) (.cse2 (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |c_ULTIMATE.start_main_~n~0#1.base|)))) (store .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.base|) 4 0))))) (store .cse6 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |v_ULTIMATE.start_main_~n~0#1.base_20|)))) (.cse5 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5)) (.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5))) (or (and (= .cse0 0) (= .cse1 0)) (= |c_ULTIMATE.start_main_~tail~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_20|) (let ((.cse3 (+ .cse0 4))) (and (= (select (select .cse2 .cse1) .cse3) 0) (= (select (select .cse4 .cse1) .cse3) 0)))))))) is different from false [2021-11-20 05:51:23,022 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~n~0#1.base_20| Int)) (let ((.cse7 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4)) (.cse10 (+ |c_ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (let ((.cse11 (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) .cse10 0)))) (store .cse13 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |c_ULTIMATE.start_main_~n~0#1.offset|))))) (store .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.offset|) 4 0))))) (store .cse11 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 0)))) (.cse3 (let ((.cse6 (let ((.cse8 (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse10 0)))) (store .cse9 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse9 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |c_ULTIMATE.start_main_~n~0#1.base|))))) (store .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.base|) 4 0))))) (store .cse6 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |v_ULTIMATE.start_main_~n~0#1.base_20|)))) (.cse5 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5)) (.cse4 (select (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5))) (or (let ((.cse2 (+ 4 .cse4))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0))) (and (= .cse1 0) (= 0 .cse4)) (= |c_ULTIMATE.start_main_~tail~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_20|)))))) is different from false [2021-11-20 05:51:26,074 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (|v_ULTIMATE.start_main_~n~0#1.base_20| Int) (|ULTIMATE.start_main_~n~0#1.offset| Int)) (let ((.cse7 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4)) (.cse10 (+ |ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (let ((.cse11 (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |ULTIMATE.start_main_~n~0#1.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse10 0)))) (store .cse13 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |c_ULTIMATE.start_main_~n~0#1.base|))))) (store .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.base|) 4 0))))) (store .cse11 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |v_ULTIMATE.start_main_~n~0#1.base_20|)))) (.cse3 (let ((.cse6 (let ((.cse8 (let ((.cse9 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) |ULTIMATE.start_main_~n~0#1.offset| |ULTIMATE.start_main_~tail~0#1.offset|) .cse10 0)))) (store .cse9 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse9 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |ULTIMATE.start_main_~n~0#1.offset|))))) (store .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |ULTIMATE.start_main_~tail~0#1.offset|) 4 0))))) (store .cse6 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 0)))) (.cse5 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5)) (.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5))) (or (let ((.cse2 (+ .cse4 4))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0))) (and (= .cse4 0) (= .cse1 0)) (= |c_ULTIMATE.start_main_~tail~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_20|)))))) is different from false [2021-11-20 05:51:35,145 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~n~0#1.base_21| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_21|) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (|v_ULTIMATE.start_main_~n~0#1.base_20| Int) (|ULTIMATE.start_main_~n~0#1.offset| Int)) (let ((.cse7 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4)) (.cse10 (+ |ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse3 (let ((.cse11 (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_21| (store (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_21|) |ULTIMATE.start_main_~n~0#1.offset| |ULTIMATE.start_main_~tail~0#1.offset|) .cse10 0)))) (store .cse13 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |ULTIMATE.start_main_~n~0#1.offset|))))) (store .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |ULTIMATE.start_main_~tail~0#1.offset|) 4 0))))) (store .cse11 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 0)))) (.cse0 (let ((.cse6 (let ((.cse8 (let ((.cse9 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_21| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_21|) |ULTIMATE.start_main_~n~0#1.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse10 0)))) (store .cse9 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse9 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |v_ULTIMATE.start_main_~n~0#1.base_21|))))) (store .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~tail~0#1.base|) 4 0))))) (store .cse6 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse7 |v_ULTIMATE.start_main_~n~0#1.base_20|)))) (.cse5 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5)) (.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse5))) (or (let ((.cse2 (+ .cse4 4))) (and (= 0 (select (select .cse0 .cse1) .cse2)) (= 0 (select (select .cse3 .cse1) .cse2)))) (and (= .cse1 0) (= .cse4 0)) (= |c_ULTIMATE.start_main_~tail~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_20|)))))))) is different from false [2021-11-20 05:51:41,386 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (|v_ULTIMATE.start_main_~n~0#1.base_21| Int) (|v_ULTIMATE.start_main_~n~0#1.base_20| Int) (|ULTIMATE.start_main_~n~0#1.offset| Int)) (let ((.cse8 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4)) (.cse11 (+ |ULTIMATE.start_main_~n~0#1.offset| 4))) (let ((.cse0 (let ((.cse12 (let ((.cse13 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_21| (store (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~n~0#1.base_21|) |ULTIMATE.start_main_~n~0#1.offset| |ULTIMATE.start_main_~tail~0#1.offset|) .cse11 0)))) (store .cse13 |c_ULTIMATE.start_main_~#list~0#1.base| (store (select .cse13 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse8 |ULTIMATE.start_main_~n~0#1.offset|))))) (store .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse12 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |ULTIMATE.start_main_~tail~0#1.offset|) 4 0)))) (.cse4 (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_21| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~n~0#1.base_21|) |ULTIMATE.start_main_~n~0#1.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) .cse11 0)))) (store .cse10 |c_ULTIMATE.start_main_~#list~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse8 |v_ULTIMATE.start_main_~n~0#1.base_21|))))) (store .cse9 |v_ULTIMATE.start_main_~n~0#1.base_20| (store (store (select .cse9 |v_ULTIMATE.start_main_~n~0#1.base_20|) 0 |c_ULTIMATE.start_main_~#list~0#1.base|) 4 0))))) (let ((.cse5 (store (select .cse4 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse8 |v_ULTIMATE.start_main_~n~0#1.base_20|)) (.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.base|) .cse8 0)) (.cse7 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (let ((.cse6 (select .cse1 .cse7)) (.cse2 (select .cse5 .cse7))) (or (let ((.cse3 (+ .cse6 4))) (and (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#list~0#1.base| .cse1) .cse2) .cse3) 0) (= (select (select (store .cse4 |c_ULTIMATE.start_main_~#list~0#1.base| .cse5) .cse2) .cse3) 0))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~n~0#1.base_21|) (= |c_ULTIMATE.start_main_~#list~0#1.base| |v_ULTIMATE.start_main_~n~0#1.base_20|) (and (= .cse6 0) (= .cse2 0)))))))) is different from false [2021-11-20 05:51:43,462 INFO L354 Elim1Store]: treesize reduction 6723, result has 3.4 percent of original size [2021-11-20 05:51:43,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 720442186 treesize of output 393399364