./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbc481d3ec951b41c9d36cdee0bbff1ced82f7341f89550335b9252931676d09 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:35:03,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:35:03,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:35:03,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:35:03,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:35:03,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:35:03,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:35:03,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:35:03,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:35:03,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:35:03,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:35:03,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:35:03,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:35:03,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:35:03,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:35:03,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:35:03,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:35:03,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:35:03,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:35:03,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:35:03,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:35:03,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:35:03,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:35:03,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:35:03,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:35:03,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:35:03,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:35:03,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:35:03,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:35:03,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:35:03,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:35:03,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:35:03,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:35:03,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:35:03,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:35:03,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:35:03,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:35:03,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:35:03,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:35:03,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:35:03,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:35:03,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:35:03,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:35:03,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:35:03,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:35:03,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:35:03,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:35:03,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:35:03,797 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:35:03,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:35:03,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:35:03,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:35:03,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:35:03,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:35:03,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:35:03,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:35:03,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:35:03,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:35:03,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:35:03,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:35:03,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:35:03,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:35:03,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:35:03,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:35:03,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:35:03,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:35:03,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:35:03,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:35:03,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:35:03,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:35:03,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:35:03,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:35:03,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:35:03,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:35:03,813 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_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbc481d3ec951b41c9d36cdee0bbff1ced82f7341f89550335b9252931676d09 [2021-11-07 08:35:04,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:35:04,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:35:04,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:35:04,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:35:04,185 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:35:04,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-07 08:35:04,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/data/ed4a164a6/ad4e7a2693c14337aa8e059f6b242b28/FLAG5c8b4e263 [2021-11-07 08:35:05,266 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:35:05,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-07 08:35:05,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/data/ed4a164a6/ad4e7a2693c14337aa8e059f6b242b28/FLAG5c8b4e263 [2021-11-07 08:35:05,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/data/ed4a164a6/ad4e7a2693c14337aa8e059f6b242b28 [2021-11-07 08:35:05,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:35:05,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:35:05,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:35:05,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:35:05,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:35:05,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:35:05" (1/1) ... [2021-11-07 08:35:05,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5844206f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:05, skipping insertion in model container [2021-11-07 08:35:05,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:35:05" (1/1) ... [2021-11-07 08:35:05,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:35:05,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:35:06,291 WARN L228 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_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[8858,8871] [2021-11-07 08:35:06,401 WARN L228 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_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[16363,16376] [2021-11-07 08:35:07,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:35:07,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:35:07,687 WARN L228 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_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[8858,8871] [2021-11-07 08:35:07,710 WARN L228 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_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[16363,16376] [2021-11-07 08:35:08,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:35:08,388 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:35:08,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08 WrapperNode [2021-11-07 08:35:08,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:35:08,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:35:08,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:35:08,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:35:08,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:08,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:08,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:35:08,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:35:08,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:35:08,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:35:08,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:08,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:35:09,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:35:09,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:35:09,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:35:09,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (1/1) ... [2021-11-07 08:35:09,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:35:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:09,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:35:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:35:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:35:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:35:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:35:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:35:15,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:35:15,202 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-07 08:35:15,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:35:15 BoogieIcfgContainer [2021-11-07 08:35:15,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:35:15,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:35:15,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:35:15,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:35:15,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:35:05" (1/3) ... [2021-11-07 08:35:15,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482d01dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:35:15, skipping insertion in model container [2021-11-07 08:35:15,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:35:08" (2/3) ... [2021-11-07 08:35:15,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482d01dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:35:15, skipping insertion in model container [2021-11-07 08:35:15,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:35:15" (3/3) ... [2021-11-07 08:35:15,219 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-07 08:35:15,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:35:15,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 08:35:15,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:35:15,319 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:35:15,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:35:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 892 states, 889 states have (on average 1.9032620922384702) internal successors, (1692), 891 states have internal predecessors, (1692), 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) [2021-11-07 08:35:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:35:15,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:15,392 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:15,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-11-07 08:35:15,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:15,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202740771] [2021-11-07 08:35:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:15,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:15,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202740771] [2021-11-07 08:35:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202740771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:15,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:15,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:35:15,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715290444] [2021-11-07 08:35:15,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:35:15,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:35:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:35:15,744 INFO L87 Difference]: Start difference. First operand has 892 states, 889 states have (on average 1.9032620922384702) internal successors, (1692), 891 states have internal predecessors, (1692), 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) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2021-11-07 08:35:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:15,841 INFO L93 Difference]: Finished difference Result 1753 states and 3328 transitions. [2021-11-07 08:35:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:35:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-11-07 08:35:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:15,875 INFO L225 Difference]: With dead ends: 1753 [2021-11-07 08:35:15,875 INFO L226 Difference]: Without dead ends: 826 [2021-11-07 08:35:15,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:35:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-07 08:35:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-11-07 08:35:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 824 states have (on average 1.891990291262136) internal successors, (1559), 825 states have internal predecessors, (1559), 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) [2021-11-07 08:35:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1559 transitions. [2021-11-07 08:35:16,028 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1559 transitions. Word has length 30 [2021-11-07 08:35:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:16,029 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1559 transitions. [2021-11-07 08:35:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2021-11-07 08:35:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1559 transitions. [2021-11-07 08:35:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:35:16,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:16,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:16,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:35:16,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-11-07 08:35:16,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:16,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881382756] [2021-11-07 08:35:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:16,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:16,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:16,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881382756] [2021-11-07 08:35:16,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881382756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:16,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:16,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:35:16,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858468401] [2021-11-07 08:35:16,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:35:16,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:35:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:35:16,247 INFO L87 Difference]: Start difference. First operand 826 states and 1559 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-11-07 08:35:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:16,368 INFO L93 Difference]: Finished difference Result 873 states and 1631 transitions. [2021-11-07 08:35:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:35:16,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2021-11-07 08:35:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:16,375 INFO L225 Difference]: With dead ends: 873 [2021-11-07 08:35:16,375 INFO L226 Difference]: Without dead ends: 826 [2021-11-07 08:35:16,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:35:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-07 08:35:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-11-07 08:35:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 824 states have (on average 1.8640776699029127) internal successors, (1536), 825 states have internal predecessors, (1536), 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) [2021-11-07 08:35:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1536 transitions. [2021-11-07 08:35:16,407 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1536 transitions. Word has length 30 [2021-11-07 08:35:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:16,408 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1536 transitions. [2021-11-07 08:35:16,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-11-07 08:35:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1536 transitions. [2021-11-07 08:35:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:35:16,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:16,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:16,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:35:16,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:16,429 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-11-07 08:35:16,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:16,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343121630] [2021-11-07 08:35:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:16,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:16,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:16,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343121630] [2021-11-07 08:35:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343121630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:16,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:16,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:16,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950914434] [2021-11-07 08:35:16,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:35:16,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:35:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:16,598 INFO L87 Difference]: Start difference. First operand 826 states and 1536 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:16,637 INFO L93 Difference]: Finished difference Result 906 states and 1662 transitions. [2021-11-07 08:35:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:35:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 08:35:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:16,647 INFO L225 Difference]: With dead ends: 906 [2021-11-07 08:35:16,648 INFO L226 Difference]: Without dead ends: 863 [2021-11-07 08:35:16,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-07 08:35:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 861. [2021-11-07 08:35:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 859 states have (on average 1.8533178114086146) internal successors, (1592), 860 states have internal predecessors, (1592), 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) [2021-11-07 08:35:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1592 transitions. [2021-11-07 08:35:16,681 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1592 transitions. Word has length 52 [2021-11-07 08:35:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:16,682 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1592 transitions. [2021-11-07 08:35:16,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1592 transitions. [2021-11-07 08:35:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:35:16,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:16,686 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:16,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:35:16,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-11-07 08:35:16,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:16,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821600537] [2021-11-07 08:35:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:16,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:16,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:16,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821600537] [2021-11-07 08:35:16,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821600537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:16,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:16,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:16,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844679794] [2021-11-07 08:35:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:35:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:35:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:16,833 INFO L87 Difference]: Start difference. First operand 861 states and 1592 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:16,875 INFO L93 Difference]: Finished difference Result 1005 states and 1820 transitions. [2021-11-07 08:35:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:35:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 08:35:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:16,882 INFO L225 Difference]: With dead ends: 1005 [2021-11-07 08:35:16,883 INFO L226 Difference]: Without dead ends: 927 [2021-11-07 08:35:16,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-07 08:35:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 925. [2021-11-07 08:35:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 923 states have (on average 1.8342361863488623) internal successors, (1693), 924 states have internal predecessors, (1693), 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) [2021-11-07 08:35:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1693 transitions. [2021-11-07 08:35:16,919 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1693 transitions. Word has length 52 [2021-11-07 08:35:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1693 transitions. [2021-11-07 08:35:16,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1693 transitions. [2021-11-07 08:35:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:35:16,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:16,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:16,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:35:16,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-11-07 08:35:16,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:16,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106059677] [2021-11-07 08:35:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:16,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:17,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106059677] [2021-11-07 08:35:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106059677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:17,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567138801] [2021-11-07 08:35:17,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:35:17,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:35:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:17,012 INFO L87 Difference]: Start difference. First operand 925 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:17,069 INFO L93 Difference]: Finished difference Result 1185 states and 2103 transitions. [2021-11-07 08:35:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:35:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 08:35:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:17,079 INFO L225 Difference]: With dead ends: 1185 [2021-11-07 08:35:17,079 INFO L226 Difference]: Without dead ends: 1043 [2021-11-07 08:35:17,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-07 08:35:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2021-11-07 08:35:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1039 states have (on average 1.8026948989412896) internal successors, (1873), 1040 states have internal predecessors, (1873), 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) [2021-11-07 08:35:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1873 transitions. [2021-11-07 08:35:17,139 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1873 transitions. Word has length 52 [2021-11-07 08:35:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:17,139 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1873 transitions. [2021-11-07 08:35:17,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1873 transitions. [2021-11-07 08:35:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:35:17,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:17,141 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:17,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:35:17,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-11-07 08:35:17,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:17,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470801372] [2021-11-07 08:35:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:17,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:17,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:17,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470801372] [2021-11-07 08:35:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470801372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:17,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:17,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:17,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160946684] [2021-11-07 08:35:17,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:35:17,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:35:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:17,206 INFO L87 Difference]: Start difference. First operand 1041 states and 1873 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:17,269 INFO L93 Difference]: Finished difference Result 1509 states and 2603 transitions. [2021-11-07 08:35:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:35:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-07 08:35:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:17,333 INFO L225 Difference]: With dead ends: 1509 [2021-11-07 08:35:17,334 INFO L226 Difference]: Without dead ends: 1251 [2021-11-07 08:35:17,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-07 08:35:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2021-11-07 08:35:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1247 states have (on average 1.7554129911788292) internal successors, (2189), 1248 states have internal predecessors, (2189), 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) [2021-11-07 08:35:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2189 transitions. [2021-11-07 08:35:17,377 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2189 transitions. Word has length 52 [2021-11-07 08:35:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:17,378 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 2189 transitions. [2021-11-07 08:35:17,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2189 transitions. [2021-11-07 08:35:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:35:17,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:17,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:35:17,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-11-07 08:35:17,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:17,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074798384] [2021-11-07 08:35:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:17,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:17,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:17,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074798384] [2021-11-07 08:35:17,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074798384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:17,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:17,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:17,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439629128] [2021-11-07 08:35:17,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:17,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:17,454 INFO L87 Difference]: Start difference. First operand 1249 states and 2189 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:17,767 INFO L93 Difference]: Finished difference Result 4977 states and 7957 transitions. [2021-11-07 08:35:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:35:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-11-07 08:35:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:17,797 INFO L225 Difference]: With dead ends: 4977 [2021-11-07 08:35:17,797 INFO L226 Difference]: Without dead ends: 4511 [2021-11-07 08:35:17,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:35:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-11-07 08:35:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 1713. [2021-11-07 08:35:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1711 states have (on average 1.6814728229105786) internal successors, (2877), 1712 states have internal predecessors, (2877), 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) [2021-11-07 08:35:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2877 transitions. [2021-11-07 08:35:17,921 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2877 transitions. Word has length 52 [2021-11-07 08:35:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:17,922 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 2877 transitions. [2021-11-07 08:35:17,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-07 08:35:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2877 transitions. [2021-11-07 08:35:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:35:17,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:17,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:17,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:35:17,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-11-07 08:35:17,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:17,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479340458] [2021-11-07 08:35:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:17,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:17,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479340458] [2021-11-07 08:35:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479340458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:17,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:17,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:17,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365920874] [2021-11-07 08:35:17,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:35:17,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:35:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:17,986 INFO L87 Difference]: Start difference. First operand 1713 states and 2877 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 08:35:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:18,104 INFO L93 Difference]: Finished difference Result 3071 states and 4929 transitions. [2021-11-07 08:35:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:35:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-07 08:35:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:18,118 INFO L225 Difference]: With dead ends: 3071 [2021-11-07 08:35:18,118 INFO L226 Difference]: Without dead ends: 2141 [2021-11-07 08:35:18,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:35:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-07 08:35:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2021-11-07 08:35:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2137 states have (on average 1.635470285446888) internal successors, (3495), 2138 states have internal predecessors, (3495), 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) [2021-11-07 08:35:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3495 transitions. [2021-11-07 08:35:18,235 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3495 transitions. Word has length 54 [2021-11-07 08:35:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 3495 transitions. [2021-11-07 08:35:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 08:35:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3495 transitions. [2021-11-07 08:35:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:35:18,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:18,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:18,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:35:18,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-11-07 08:35:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:18,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867116602] [2021-11-07 08:35:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:18,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:18,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867116602] [2021-11-07 08:35:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867116602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:18,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:18,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025857499] [2021-11-07 08:35:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:18,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:18,471 INFO L87 Difference]: Start difference. First operand 2139 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-11-07 08:35:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:18,734 INFO L93 Difference]: Finished difference Result 3495 states and 5521 transitions. [2021-11-07 08:35:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 54 [2021-11-07 08:35:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:18,750 INFO L225 Difference]: With dead ends: 3495 [2021-11-07 08:35:18,750 INFO L226 Difference]: Without dead ends: 2141 [2021-11-07 08:35:18,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:35:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-07 08:35:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2021-11-07 08:35:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2137 states have (on average 1.6242395882077678) internal successors, (3471), 2138 states have internal predecessors, (3471), 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) [2021-11-07 08:35:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3471 transitions. [2021-11-07 08:35:18,872 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3471 transitions. Word has length 54 [2021-11-07 08:35:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:18,873 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 3471 transitions. [2021-11-07 08:35:18,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2021-11-07 08:35:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3471 transitions. [2021-11-07 08:35:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:35:18,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:18,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:18,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:35:18,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-11-07 08:35:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:18,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96822087] [2021-11-07 08:35:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:18,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:19,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:19,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96822087] [2021-11-07 08:35:19,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96822087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:19,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:19,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:35:19,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272945531] [2021-11-07 08:35:19,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:19,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:19,011 INFO L87 Difference]: Start difference. First operand 2139 states and 3471 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:35:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:19,258 INFO L93 Difference]: Finished difference Result 3493 states and 5472 transitions. [2021-11-07 08:35:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-11-07 08:35:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:19,274 INFO L225 Difference]: With dead ends: 3493 [2021-11-07 08:35:19,274 INFO L226 Difference]: Without dead ends: 2139 [2021-11-07 08:35:19,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-11-07 08:35:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2021-11-07 08:35:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2137 states have (on average 1.6130088909686477) internal successors, (3447), 2138 states have internal predecessors, (3447), 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) [2021-11-07 08:35:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3447 transitions. [2021-11-07 08:35:19,423 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3447 transitions. Word has length 55 [2021-11-07 08:35:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:19,423 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 3447 transitions. [2021-11-07 08:35:19,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:35:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3447 transitions. [2021-11-07 08:35:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:35:19,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:19,425 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:35:19,426 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-11-07 08:35:19,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:19,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441346636] [2021-11-07 08:35:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:19,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:19,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:19,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441346636] [2021-11-07 08:35:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441346636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:19,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:35:19,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994694921] [2021-11-07 08:35:19,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:19,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:19,542 INFO L87 Difference]: Start difference. First operand 2139 states and 3447 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:35:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:19,804 INFO L93 Difference]: Finished difference Result 3493 states and 5424 transitions. [2021-11-07 08:35:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-11-07 08:35:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:19,820 INFO L225 Difference]: With dead ends: 3493 [2021-11-07 08:35:19,820 INFO L226 Difference]: Without dead ends: 2139 [2021-11-07 08:35:19,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-11-07 08:35:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2021-11-07 08:35:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2137 states have (on average 1.6017781937295275) internal successors, (3423), 2138 states have internal predecessors, (3423), 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) [2021-11-07 08:35:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3423 transitions. [2021-11-07 08:35:19,972 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3423 transitions. Word has length 55 [2021-11-07 08:35:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:19,973 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 3423 transitions. [2021-11-07 08:35:19,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:35:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3423 transitions. [2021-11-07 08:35:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:35:19,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:19,974 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:19,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:35:19,975 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-11-07 08:35:19,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:19,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595668810] [2021-11-07 08:35:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:19,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:20,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:20,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595668810] [2021-11-07 08:35:20,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595668810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:20,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:20,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:35:20,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658648356] [2021-11-07 08:35:20,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:35:20,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:35:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:35:20,128 INFO L87 Difference]: Start difference. First operand 2139 states and 3423 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-11-07 08:35:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:20,530 INFO L93 Difference]: Finished difference Result 3338 states and 5089 transitions. [2021-11-07 08:35:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:35:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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 55 [2021-11-07 08:35:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:20,554 INFO L225 Difference]: With dead ends: 3338 [2021-11-07 08:35:20,554 INFO L226 Difference]: Without dead ends: 3336 [2021-11-07 08:35:20,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:35:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-11-07 08:35:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2235. [2021-11-07 08:35:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2233 states have (on average 1.5723242274966414) internal successors, (3511), 2234 states have internal predecessors, (3511), 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) [2021-11-07 08:35:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3511 transitions. [2021-11-07 08:35:20,800 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3511 transitions. Word has length 55 [2021-11-07 08:35:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:20,800 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 3511 transitions. [2021-11-07 08:35:20,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-11-07 08:35:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3511 transitions. [2021-11-07 08:35:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:35:20,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:20,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:20,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:35:20,802 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1203493419, now seen corresponding path program 1 times [2021-11-07 08:35:20,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:20,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315867548] [2021-11-07 08:35:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:20,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:20,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:20,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315867548] [2021-11-07 08:35:20,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315867548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:20,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:20,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:35:20,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385206939] [2021-11-07 08:35:20,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:35:20,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:35:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:35:20,898 INFO L87 Difference]: Start difference. First operand 2235 states and 3511 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 08:35:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:29,452 INFO L93 Difference]: Finished difference Result 4490 states and 7820 transitions. [2021-11-07 08:35:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:35:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-07 08:35:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:29,481 INFO L225 Difference]: With dead ends: 4490 [2021-11-07 08:35:29,481 INFO L226 Difference]: Without dead ends: 3737 [2021-11-07 08:35:29,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:35:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-07 08:35:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2021-11-07 08:35:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3735 states have (on average 1.4690763052208835) internal successors, (5487), 3736 states have internal predecessors, (5487), 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) [2021-11-07 08:35:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5487 transitions. [2021-11-07 08:35:29,796 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5487 transitions. Word has length 67 [2021-11-07 08:35:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:29,797 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 5487 transitions. [2021-11-07 08:35:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-07 08:35:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5487 transitions. [2021-11-07 08:35:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:35:29,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:29,802 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:29,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:35:29,802 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1830558034, now seen corresponding path program 1 times [2021-11-07 08:35:29,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:29,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315239806] [2021-11-07 08:35:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:29,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:35:29,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:29,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315239806] [2021-11-07 08:35:29,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315239806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:29,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:29,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:29,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739752908] [2021-11-07 08:35:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:29,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:29,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:29,933 INFO L87 Difference]: Start difference. First operand 3737 states and 5487 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2021-11-07 08:35:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:30,721 INFO L93 Difference]: Finished difference Result 9843 states and 14056 transitions. [2021-11-07 08:35:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 78 [2021-11-07 08:35:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:30,771 INFO L225 Difference]: With dead ends: 9843 [2021-11-07 08:35:30,771 INFO L226 Difference]: Without dead ends: 8393 [2021-11-07 08:35:30,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-11-07 08:35:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 5185. [2021-11-07 08:35:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 5183 states have (on average 1.447617210109975) internal successors, (7503), 5184 states have internal predecessors, (7503), 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) [2021-11-07 08:35:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7503 transitions. [2021-11-07 08:35:31,365 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7503 transitions. Word has length 78 [2021-11-07 08:35:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:31,366 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 7503 transitions. [2021-11-07 08:35:31,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2021-11-07 08:35:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7503 transitions. [2021-11-07 08:35:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:35:31,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:31,370 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:31,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:35:31,370 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 61775218, now seen corresponding path program 1 times [2021-11-07 08:35:31,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:31,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853255433] [2021-11-07 08:35:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:31,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:35:31,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:31,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853255433] [2021-11-07 08:35:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853255433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:31,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:31,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:31,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421750234] [2021-11-07 08:35:31,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:31,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:31,475 INFO L87 Difference]: Start difference. First operand 5185 states and 7503 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-07 08:35:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:32,273 INFO L93 Difference]: Finished difference Result 11291 states and 16072 transitions. [2021-11-07 08:35:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 78 [2021-11-07 08:35:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:32,310 INFO L225 Difference]: With dead ends: 11291 [2021-11-07 08:35:32,310 INFO L226 Difference]: Without dead ends: 9841 [2021-11-07 08:35:32,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9841 states. [2021-11-07 08:35:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9841 to 7361. [2021-11-07 08:35:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 7359 states have (on average 1.4277755129773066) internal successors, (10507), 7360 states have internal predecessors, (10507), 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) [2021-11-07 08:35:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 10507 transitions. [2021-11-07 08:35:32,930 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 10507 transitions. Word has length 78 [2021-11-07 08:35:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:32,930 INFO L470 AbstractCegarLoop]: Abstraction has 7361 states and 10507 transitions. [2021-11-07 08:35:32,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-07 08:35:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 10507 transitions. [2021-11-07 08:35:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:35:32,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:32,934 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:32,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:35:32,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:32,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1193415058, now seen corresponding path program 1 times [2021-11-07 08:35:32,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:32,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139016657] [2021-11-07 08:35:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:32,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:35:33,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:33,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139016657] [2021-11-07 08:35:33,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139016657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:33,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:33,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:33,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761491218] [2021-11-07 08:35:33,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:33,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:33,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:33,025 INFO L87 Difference]: Start difference. First operand 7361 states and 10507 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-07 08:35:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:33,780 INFO L93 Difference]: Finished difference Result 12739 states and 18088 transitions. [2021-11-07 08:35:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:33,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 78 [2021-11-07 08:35:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:33,813 INFO L225 Difference]: With dead ends: 12739 [2021-11-07 08:35:33,813 INFO L226 Difference]: Without dead ends: 11289 [2021-11-07 08:35:33,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11289 states. [2021-11-07 08:35:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11289 to 8809. [2021-11-07 08:35:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8809 states, 8807 states have (on average 1.4219370954922221) internal successors, (12523), 8808 states have internal predecessors, (12523), 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) [2021-11-07 08:35:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12523 transitions. [2021-11-07 08:35:34,511 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12523 transitions. Word has length 78 [2021-11-07 08:35:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:34,511 INFO L470 AbstractCegarLoop]: Abstraction has 8809 states and 12523 transitions. [2021-11-07 08:35:34,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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) [2021-11-07 08:35:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12523 transitions. [2021-11-07 08:35:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:35:34,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:34,516 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:34,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:35:34,516 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -42043982, now seen corresponding path program 1 times [2021-11-07 08:35:34,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:34,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958140476] [2021-11-07 08:35:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:34,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:35:34,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:34,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958140476] [2021-11-07 08:35:34,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958140476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:35:34,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:35:34,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:35:34,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207975753] [2021-11-07 08:35:34,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:35:34,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:35:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:35:34,624 INFO L87 Difference]: Start difference. First operand 8809 states and 12523 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-07 08:35:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:35,650 INFO L93 Difference]: Finished difference Result 13339 states and 18936 transitions. [2021-11-07 08:35:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:35:35,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 78 [2021-11-07 08:35:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:35,684 INFO L225 Difference]: With dead ends: 13339 [2021-11-07 08:35:35,684 INFO L226 Difference]: Without dead ends: 12313 [2021-11-07 08:35:35,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:35:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2021-11-07 08:35:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 9833. [2021-11-07 08:35:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9833 states, 9831 states have (on average 1.4203031227748957) internal successors, (13963), 9832 states have internal predecessors, (13963), 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) [2021-11-07 08:35:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 13963 transitions. [2021-11-07 08:35:36,639 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 13963 transitions. Word has length 78 [2021-11-07 08:35:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:36,640 INFO L470 AbstractCegarLoop]: Abstraction has 9833 states and 13963 transitions. [2021-11-07 08:35:36,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-07 08:35:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 13963 transitions. [2021-11-07 08:35:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:35:36,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:36,645 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:36,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:35:36,646 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1839803446, now seen corresponding path program 1 times [2021-11-07 08:35:36,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:36,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629184174] [2021-11-07 08:35:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:36,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:36,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:36,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629184174] [2021-11-07 08:35:36,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629184174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:36,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804292034] [2021-11-07 08:35:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:36,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:36,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:35:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:35:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:35:37,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804292034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:37,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:37,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-07 08:35:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333554836] [2021-11-07 08:35:37,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:35:37,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:35:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:35:37,840 INFO L87 Difference]: Start difference. First operand 9833 states and 13963 transitions. Second operand has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 12 states have internal predecessors, (151), 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) [2021-11-07 08:35:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:43,078 INFO L93 Difference]: Finished difference Result 39339 states and 54766 transitions. [2021-11-07 08:35:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:35:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 12 states have internal predecessors, (151), 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 79 [2021-11-07 08:35:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:43,137 INFO L225 Difference]: With dead ends: 39339 [2021-11-07 08:35:43,137 INFO L226 Difference]: Without dead ends: 33705 [2021-11-07 08:35:43,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:35:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33705 states. [2021-11-07 08:35:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33705 to 26657. [2021-11-07 08:35:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 26655 states have (on average 1.3880697805289814) internal successors, (36999), 26656 states have internal predecessors, (36999), 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) [2021-11-07 08:35:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 36999 transitions. [2021-11-07 08:35:45,573 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 36999 transitions. Word has length 79 [2021-11-07 08:35:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:45,573 INFO L470 AbstractCegarLoop]: Abstraction has 26657 states and 36999 transitions. [2021-11-07 08:35:45,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 12 states have internal predecessors, (151), 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) [2021-11-07 08:35:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 36999 transitions. [2021-11-07 08:35:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:35:45,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:45,579 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:45,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:35:45,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1196201514, now seen corresponding path program 1 times [2021-11-07 08:35:45,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:45,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406969562] [2021-11-07 08:35:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:45,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:46,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:46,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406969562] [2021-11-07 08:35:46,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406969562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:46,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874527118] [2021-11-07 08:35:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:46,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:46,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:46,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:46,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:35:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:35:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:47,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874527118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:47,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:47,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 08:35:47,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886518043] [2021-11-07 08:35:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:35:47,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:35:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:35:47,861 INFO L87 Difference]: Start difference. First operand 26657 states and 36999 transitions. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 16 states have internal predecessors, (141), 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) [2021-11-07 08:36:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:01,815 INFO L93 Difference]: Finished difference Result 154347 states and 210278 transitions. [2021-11-07 08:36:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:36:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 16 states have internal predecessors, (141), 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 80 [2021-11-07 08:36:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:02,168 INFO L225 Difference]: With dead ends: 154347 [2021-11-07 08:36:02,169 INFO L226 Difference]: Without dead ends: 129977 [2021-11-07 08:36:02,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:36:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129977 states. [2021-11-07 08:36:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129977 to 56425. [2021-11-07 08:36:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56425 states, 56423 states have (on average 1.3736774010598516) internal successors, (77507), 56424 states have internal predecessors, (77507), 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) [2021-11-07 08:36:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56425 states to 56425 states and 77507 transitions. [2021-11-07 08:36:08,951 INFO L78 Accepts]: Start accepts. Automaton has 56425 states and 77507 transitions. Word has length 80 [2021-11-07 08:36:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:08,954 INFO L470 AbstractCegarLoop]: Abstraction has 56425 states and 77507 transitions. [2021-11-07 08:36:08,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 16 states have internal predecessors, (141), 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) [2021-11-07 08:36:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56425 states and 77507 transitions. [2021-11-07 08:36:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:36:08,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:08,961 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:09,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:36:09,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:09,187 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:36:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 305868284, now seen corresponding path program 1 times [2021-11-07 08:36:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:09,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518850445] [2021-11-07 08:36:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:09,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:36:09,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:09,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518850445] [2021-11-07 08:36:09,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518850445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:09,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983472347] [2021-11-07 08:36:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:09,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:09,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:09,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:09,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5fcaddb-fe71-471c-a85b-60d7d1d4f76e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:36:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:36:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:36:11,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983472347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:11,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:11,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 08:36:11,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740625918] [2021-11-07 08:36:11,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:36:11,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:36:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:36:11,440 INFO L87 Difference]: Start difference. First operand 56425 states and 77507 transitions. Second operand has 17 states, 17 states have (on average 8.647058823529411) internal successors, (147), 16 states have internal predecessors, (147), 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)