./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX --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 cecf9186d2d4eae9e2e1a73ed2a3b99f981ef68b0a5fbf7dab78faca6e14095b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:35:20,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:35:20,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:35:20,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:35:20,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:35:20,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:35:20,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:35:20,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:35:20,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:35:20,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:35:20,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:35:20,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:35:20,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:35:20,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:35:20,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:35:20,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:35:20,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:35:20,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:35:20,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:35:20,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:35:20,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:35:20,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:35:20,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:35:20,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:35:20,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:35:20,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:35:20,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:35:20,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:35:20,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:35:20,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:35:20,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:35:20,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:35:20,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:35:20,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:35:20,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:35:20,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:35:20,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:35:20,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:35:20,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:35:20,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:35:20,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:35:20,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:35:20,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:35:20,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:35:20,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:35:20,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:35:20,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:35:20,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:35:20,814 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:35:20,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:35:20,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:35:20,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:35:20,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:35:20,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:35:20,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:35:20,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:35:20,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:35:20,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:35:20,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:35:20,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:35:20,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:35:20,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:35:20,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:35:20,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:35:20,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:20,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:35:20,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:35:20,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:35:20,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:35:20,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:35:20,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:35:20,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:35:20,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:35:20,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:35:20,826 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_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cecf9186d2d4eae9e2e1a73ed2a3b99f981ef68b0a5fbf7dab78faca6e14095b [2021-11-09 09:35:21,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:35:21,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:35:21,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:35:21,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:35:21,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:35:21,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 09:35:21,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/data/2e0bb7096/963d62d600cc4f358280b2510e0454c0/FLAG115c6279e [2021-11-09 09:35:22,379 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:35:22,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 09:35:22,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/data/2e0bb7096/963d62d600cc4f358280b2510e0454c0/FLAG115c6279e [2021-11-09 09:35:22,779 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/data/2e0bb7096/963d62d600cc4f358280b2510e0454c0 [2021-11-09 09:35:22,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:35:22,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:35:22,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:22,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:35:22,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:35:22,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:22" (1/1) ... [2021-11-09 09:35:22,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e48b7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:22, skipping insertion in model container [2021-11-09 09:35:22,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:22" (1/1) ... [2021-11-09 09:35:22,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:35:22,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:35:23,426 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_e226d35a-f2b7-4679-9276-41eb22b7b2b2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6582,6595] [2021-11-09 09:35:23,542 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_e226d35a-f2b7-4679-9276-41eb22b7b2b2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13275,13288] [2021-11-09 09:35:24,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:24,816 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:35:24,877 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_e226d35a-f2b7-4679-9276-41eb22b7b2b2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6582,6595] [2021-11-09 09:35:24,895 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_e226d35a-f2b7-4679-9276-41eb22b7b2b2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13275,13288] [2021-11-09 09:35:25,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:25,768 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:35:25,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25 WrapperNode [2021-11-09 09:35:25,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:25,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:25,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:35:25,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:35:25,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:25,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:26,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:35:26,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:35:26,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:35:26,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:26,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:27,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:35:27,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:35:27,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:35:27,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:35:27,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (1/1) ... [2021-11-09 09:35:27,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:27,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:35:27,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:35:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:35:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:35:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:35:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:35:33,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:35:33,020 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2021-11-09 09:35:33,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:35:33 BoogieIcfgContainer [2021-11-09 09:35:33,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:35:33,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:35:33,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:35:33,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:35:33,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:35:22" (1/3) ... [2021-11-09 09:35:33,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1d738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:35:33, skipping insertion in model container [2021-11-09 09:35:33,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:25" (2/3) ... [2021-11-09 09:35:33,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1d738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:35:33, skipping insertion in model container [2021-11-09 09:35:33,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:35:33" (3/3) ... [2021-11-09 09:35:33,038 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 09:35:33,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:35:33,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:35:33,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:35:33,146 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 [2021-11-09 09:35:33,146 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:35:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 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) [2021-11-09 09:35:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:35:33,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:33,221 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] [2021-11-09 09:35:33,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-09 09:35:33,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:33,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993287414] [2021-11-09 09:35:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:33,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:33,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:33,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993287414] [2021-11-09 09:35:33,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993287414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:33,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:33,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:35:33,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647724471] [2021-11-09 09:35:33,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:35:33,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:35:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:35:33,514 INFO L87 Difference]: Start difference. First operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2021-11-09 09:35:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:33,643 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2021-11-09 09:35:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:35:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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 26 [2021-11-09 09:35:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:33,684 INFO L225 Difference]: With dead ends: 1730 [2021-11-09 09:35:33,684 INFO L226 Difference]: Without dead ends: 811 [2021-11-09 09:35:33,696 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 [2021-11-09 09:35:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-09 09:35:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-09 09:35:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8936959208899877) internal successors, (1532), 810 states have internal predecessors, (1532), 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) [2021-11-09 09:35:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2021-11-09 09:35:33,819 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2021-11-09 09:35:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:33,820 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2021-11-09 09:35:33,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2021-11-09 09:35:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2021-11-09 09:35:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:35:33,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:33,823 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] [2021-11-09 09:35:33,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:35:33,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-09 09:35:33,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:33,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606157384] [2021-11-09 09:35:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:33,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606157384] [2021-11-09 09:35:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606157384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:33,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:33,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:33,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730440517] [2021-11-09 09:35:33,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:33,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:34,002 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-09 09:35:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:34,129 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2021-11-09 09:35:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:35:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-09 09:35:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:34,137 INFO L225 Difference]: With dead ends: 850 [2021-11-09 09:35:34,138 INFO L226 Difference]: Without dead ends: 811 [2021-11-09 09:35:34,140 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 [2021-11-09 09:35:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-09 09:35:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-09 09:35:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8739184177997528) internal successors, (1516), 810 states have internal predecessors, (1516), 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) [2021-11-09 09:35:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2021-11-09 09:35:34,181 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2021-11-09 09:35:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:34,182 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2021-11-09 09:35:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-09 09:35:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2021-11-09 09:35:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:35:34,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:34,192 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] [2021-11-09 09:35:34,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:35:34,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-09 09:35:34,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:34,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64886977] [2021-11-09 09:35:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:34,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:34,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:34,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64886977] [2021-11-09 09:35:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64886977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:34,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:34,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833403306] [2021-11-09 09:35:34,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:34,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:34,389 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-09 09:35:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:34,480 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2021-11-09 09:35:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-09 09:35:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:34,495 INFO L225 Difference]: With dead ends: 875 [2021-11-09 09:35:34,495 INFO L226 Difference]: Without dead ends: 840 [2021-11-09 09:35:34,496 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 [2021-11-09 09:35:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-09 09:35:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2021-11-09 09:35:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 1.8648325358851674) internal successors, (1559), 837 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) [2021-11-09 09:35:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2021-11-09 09:35:34,534 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2021-11-09 09:35:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:34,535 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2021-11-09 09:35:34,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-09 09:35:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2021-11-09 09:35:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:35:34,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:34,542 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] [2021-11-09 09:35:34,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:35:34,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-09 09:35:34,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:34,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410010520] [2021-11-09 09:35:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:34,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:34,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:34,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410010520] [2021-11-09 09:35:34,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410010520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:34,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:34,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:34,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898782096] [2021-11-09 09:35:34,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:34,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:34,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:34,710 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2021-11-09 09:35:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:34,886 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2021-11-09 09:35:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:35:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2021-11-09 09:35:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:34,896 INFO L225 Difference]: With dead ends: 1210 [2021-11-09 09:35:34,897 INFO L226 Difference]: Without dead ends: 1148 [2021-11-09 09:35:34,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:35:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-09 09:35:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2021-11-09 09:35:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.84375) internal successors, (1652), 897 states have internal predecessors, (1652), 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) [2021-11-09 09:35:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2021-11-09 09:35:34,944 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2021-11-09 09:35:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:34,945 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2021-11-09 09:35:34,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2021-11-09 09:35:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2021-11-09 09:35:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:35:34,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:34,949 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] [2021-11-09 09:35:34,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:35:34,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-09 09:35:34,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:34,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860177377] [2021-11-09 09:35:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:34,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:35,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:35,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860177377] [2021-11-09 09:35:35,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860177377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:35,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:35,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335062035] [2021-11-09 09:35:35,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:35,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:35,039 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:35,089 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2021-11-09 09:35:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-09 09:35:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:35,098 INFO L225 Difference]: With dead ends: 1079 [2021-11-09 09:35:35,099 INFO L226 Difference]: Without dead ends: 957 [2021-11-09 09:35:35,100 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 [2021-11-09 09:35:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-09 09:35:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-09 09:35:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8237145855194123) internal successors, (1738), 954 states have internal predecessors, (1738), 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) [2021-11-09 09:35:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2021-11-09 09:35:35,143 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2021-11-09 09:35:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:35,143 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2021-11-09 09:35:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2021-11-09 09:35:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:35:35,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:35,145 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] [2021-11-09 09:35:35,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:35:35,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-09 09:35:35,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:35,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584320170] [2021-11-09 09:35:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:35,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:35,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:35,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584320170] [2021-11-09 09:35:35,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584320170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:35,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:35,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403251942] [2021-11-09 09:35:35,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:35,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:35,308 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:35,440 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2021-11-09 09:35:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:35:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2021-11-09 09:35:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:35,458 INFO L225 Difference]: With dead ends: 1134 [2021-11-09 09:35:35,458 INFO L226 Difference]: Without dead ends: 957 [2021-11-09 09:35:35,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:35:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-09 09:35:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-09 09:35:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8205666316894018) internal successors, (1735), 954 states have internal predecessors, (1735), 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) [2021-11-09 09:35:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2021-11-09 09:35:35,503 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2021-11-09 09:35:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:35,504 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2021-11-09 09:35:35,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2021-11-09 09:35:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:35:35,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:35,508 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] [2021-11-09 09:35:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:35:35,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-09 09:35:35,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:35,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864113429] [2021-11-09 09:35:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:35,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:35,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864113429] [2021-11-09 09:35:35,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864113429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:35,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:35,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:35,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532109685] [2021-11-09 09:35:35,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:35,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:35,603 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:35,663 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2021-11-09 09:35:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-09 09:35:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:35,674 INFO L225 Difference]: With dead ends: 1273 [2021-11-09 09:35:35,674 INFO L226 Difference]: Without dead ends: 1096 [2021-11-09 09:35:35,676 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 [2021-11-09 09:35:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-09 09:35:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2021-11-09 09:35:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1092 states have (on average 1.7765567765567765) internal successors, (1940), 1093 states have internal predecessors, (1940), 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) [2021-11-09 09:35:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2021-11-09 09:35:35,730 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2021-11-09 09:35:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:35,733 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2021-11-09 09:35:35,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2021-11-09 09:35:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:35:35,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:35,735 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] [2021-11-09 09:35:35,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:35:35,735 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:35,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:35,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-09 09:35:35,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:35,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344486629] [2021-11-09 09:35:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:35,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:35,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:35,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344486629] [2021-11-09 09:35:35,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344486629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:35,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:35,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:35,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312715990] [2021-11-09 09:35:35,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:35,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:35,799 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:35,873 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2021-11-09 09:35:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-09 09:35:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:35,885 INFO L225 Difference]: With dead ends: 1654 [2021-11-09 09:35:35,886 INFO L226 Difference]: Without dead ends: 1338 [2021-11-09 09:35:35,887 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 [2021-11-09 09:35:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-09 09:35:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2021-11-09 09:35:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1334 states have (on average 1.712143928035982) internal successors, (2284), 1335 states have internal predecessors, (2284), 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) [2021-11-09 09:35:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2021-11-09 09:35:35,949 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2021-11-09 09:35:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:35,950 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2021-11-09 09:35:35,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-09 09:35:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2021-11-09 09:35:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:35:35,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:35,952 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] [2021-11-09 09:35:35,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:35:35,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-09 09:35:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:35,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751081968] [2021-11-09 09:35:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:35,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:36,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:36,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751081968] [2021-11-09 09:35:36,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751081968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:36,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:36,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:36,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67547204] [2021-11-09 09:35:36,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:36,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:36,032 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-11-09 09:35:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:36,184 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2021-11-09 09:35:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:35:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44 [2021-11-09 09:35:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:36,209 INFO L225 Difference]: With dead ends: 1843 [2021-11-09 09:35:36,214 INFO L226 Difference]: Without dead ends: 1841 [2021-11-09 09:35:36,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:35:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-09 09:35:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2021-11-09 09:35:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1382 states have (on average 1.6845151953690305) internal successors, (2328), 1383 states have internal predecessors, (2328), 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) [2021-11-09 09:35:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2021-11-09 09:35:36,368 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2021-11-09 09:35:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:36,368 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2021-11-09 09:35:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-11-09 09:35:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2021-11-09 09:35:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 09:35:36,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:36,371 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] [2021-11-09 09:35:36,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:35:36,371 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:36,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2111682747, now seen corresponding path program 1 times [2021-11-09 09:35:36,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:36,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241708702] [2021-11-09 09:35:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:36,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:36,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:36,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241708702] [2021-11-09 09:35:36,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241708702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:36,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:36,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:36,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115826181] [2021-11-09 09:35:36,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:35:36,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:35:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:35:36,484 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-09 09:35:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:45,567 INFO L93 Difference]: Finished difference Result 3639 states and 6637 transitions. [2021-11-09 09:35:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:35:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-09 09:35:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:45,589 INFO L225 Difference]: With dead ends: 3639 [2021-11-09 09:35:45,589 INFO L226 Difference]: Without dead ends: 2886 [2021-11-09 09:35:45,591 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 [2021-11-09 09:35:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-11-09 09:35:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2886. [2021-11-09 09:35:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2884 states have (on average 1.5402219140083218) internal successors, (4442), 2885 states have internal predecessors, (4442), 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) [2021-11-09 09:35:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4442 transitions. [2021-11-09 09:35:45,724 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4442 transitions. Word has length 60 [2021-11-09 09:35:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:45,724 INFO L470 AbstractCegarLoop]: Abstraction has 2886 states and 4442 transitions. [2021-11-09 09:35:45,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-09 09:35:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4442 transitions. [2021-11-09 09:35:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:35:45,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:45,727 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] [2021-11-09 09:35:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:35:45,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2021-11-09 09:35:45,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:45,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141044265] [2021-11-09 09:35:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:45,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:35:45,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:45,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141044265] [2021-11-09 09:35:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141044265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:45,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:45,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337775480] [2021-11-09 09:35:45,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:45,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:45,839 INFO L87 Difference]: Start difference. First operand 2886 states and 4442 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-09 09:35:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:46,099 INFO L93 Difference]: Finished difference Result 4838 states and 7214 transitions. [2021-11-09 09:35:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:35:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 63 [2021-11-09 09:35:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:46,132 INFO L225 Difference]: With dead ends: 4838 [2021-11-09 09:35:46,132 INFO L226 Difference]: Without dead ends: 4232 [2021-11-09 09:35:46,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-11-09 09:35:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3490. [2021-11-09 09:35:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3488 states have (on average 1.5177752293577982) internal successors, (5294), 3489 states have internal predecessors, (5294), 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) [2021-11-09 09:35:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 5294 transitions. [2021-11-09 09:35:46,332 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 5294 transitions. Word has length 63 [2021-11-09 09:35:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:46,332 INFO L470 AbstractCegarLoop]: Abstraction has 3490 states and 5294 transitions. [2021-11-09 09:35:46,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-09 09:35:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 5294 transitions. [2021-11-09 09:35:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:35:46,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:46,335 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] [2021-11-09 09:35:46,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:35:46,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2021-11-09 09:35:46,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:46,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088087650] [2021-11-09 09:35:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:46,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:35:46,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088087650] [2021-11-09 09:35:46,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088087650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:46,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:46,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:46,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886525546] [2021-11-09 09:35:46,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:46,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:46,433 INFO L87 Difference]: Start difference. First operand 3490 states and 5294 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-09 09:35:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:46,709 INFO L93 Difference]: Finished difference Result 5442 states and 8066 transitions. [2021-11-09 09:35:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:35:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2021-11-09 09:35:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:46,749 INFO L225 Difference]: With dead ends: 5442 [2021-11-09 09:35:46,749 INFO L226 Difference]: Without dead ends: 4836 [2021-11-09 09:35:46,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-11-09 09:35:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4398. [2021-11-09 09:35:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 4396 states have (on average 1.4927206551410372) internal successors, (6562), 4397 states have internal predecessors, (6562), 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) [2021-11-09 09:35:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 6562 transitions. [2021-11-09 09:35:47,101 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 6562 transitions. Word has length 63 [2021-11-09 09:35:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:47,102 INFO L470 AbstractCegarLoop]: Abstraction has 4398 states and 6562 transitions. [2021-11-09 09:35:47,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-09 09:35:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 6562 transitions. [2021-11-09 09:35:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:35:47,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:47,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:47,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:35:47,105 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2021-11-09 09:35:47,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:47,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93514072] [2021-11-09 09:35:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:35:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:47,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93514072] [2021-11-09 09:35:47,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93514072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:47,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:47,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:35:47,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347027482] [2021-11-09 09:35:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:35:47,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:35:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:35:47,194 INFO L87 Difference]: Start difference. First operand 4398 states and 6562 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-11-09 09:35:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:47,497 INFO L93 Difference]: Finished difference Result 5702 states and 8438 transitions. [2021-11-09 09:35:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:35:47,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 63 [2021-11-09 09:35:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:47,551 INFO L225 Difference]: With dead ends: 5702 [2021-11-09 09:35:47,560 INFO L226 Difference]: Without dead ends: 5268 [2021-11-09 09:35:47,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-11-09 09:35:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4830. [2021-11-09 09:35:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4830 states, 4828 states have (on average 1.4867439933719966) internal successors, (7178), 4829 states have internal predecessors, (7178), 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) [2021-11-09 09:35:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 7178 transitions. [2021-11-09 09:35:47,951 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 7178 transitions. Word has length 63 [2021-11-09 09:35:47,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:47,951 INFO L470 AbstractCegarLoop]: Abstraction has 4830 states and 7178 transitions. [2021-11-09 09:35:47,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-11-09 09:35:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 7178 transitions. [2021-11-09 09:35:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:35:47,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:47,961 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:47,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:35:47,961 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:47,962 INFO L85 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2021-11-09 09:35:47,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:47,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385558824] [2021-11-09 09:35:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:47,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:48,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:48,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385558824] [2021-11-09 09:35:48,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385558824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:48,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:48,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:48,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630029789] [2021-11-09 09:35:48,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:48,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:48,025 INFO L87 Difference]: Start difference. First operand 4830 states and 7178 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-09 09:35:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:48,304 INFO L93 Difference]: Finished difference Result 7382 states and 10780 transitions. [2021-11-09 09:35:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-09 09:35:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:48,320 INFO L225 Difference]: With dead ends: 7382 [2021-11-09 09:35:48,320 INFO L226 Difference]: Without dead ends: 4832 [2021-11-09 09:35:48,326 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 [2021-11-09 09:35:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2021-11-09 09:35:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 4830. [2021-11-09 09:35:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4830 states, 4828 states have (on average 1.476387738193869) internal successors, (7128), 4829 states have internal predecessors, (7128), 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) [2021-11-09 09:35:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 7128 transitions. [2021-11-09 09:35:48,652 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 7128 transitions. Word has length 64 [2021-11-09 09:35:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:48,653 INFO L470 AbstractCegarLoop]: Abstraction has 4830 states and 7128 transitions. [2021-11-09 09:35:48,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-09 09:35:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 7128 transitions. [2021-11-09 09:35:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:35:48,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:48,656 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:48,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:35:48,657 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2021-11-09 09:35:48,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:48,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266157535] [2021-11-09 09:35:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:48,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:48,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:48,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266157535] [2021-11-09 09:35:48,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266157535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:48,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:48,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857972333] [2021-11-09 09:35:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:48,738 INFO L87 Difference]: Start difference. First operand 4830 states and 7128 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-09 09:35:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:48,900 INFO L93 Difference]: Finished difference Result 6108 states and 8905 transitions. [2021-11-09 09:35:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-09 09:35:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:48,911 INFO L225 Difference]: With dead ends: 6108 [2021-11-09 09:35:48,911 INFO L226 Difference]: Without dead ends: 3558 [2021-11-09 09:35:48,919 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 [2021-11-09 09:35:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-11-09 09:35:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3556. [2021-11-09 09:35:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3554 states have (on average 1.4991558806978054) internal successors, (5328), 3555 states have internal predecessors, (5328), 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) [2021-11-09 09:35:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5328 transitions. [2021-11-09 09:35:49,116 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5328 transitions. Word has length 64 [2021-11-09 09:35:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:49,117 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 5328 transitions. [2021-11-09 09:35:49,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-09 09:35:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5328 transitions. [2021-11-09 09:35:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:35:49,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:49,119 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] [2021-11-09 09:35:49,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:35:49,120 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2021-11-09 09:35:49,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:49,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315382697] [2021-11-09 09:35:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:49,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:49,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:49,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315382697] [2021-11-09 09:35:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315382697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:49,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552533333] [2021-11-09 09:35:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:49,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:49,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:49,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:35:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:49,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:35:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:35:50,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552533333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:50,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-09 09:35:50,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726984375] [2021-11-09 09:35:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:35:50,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:35:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:35:50,202 INFO L87 Difference]: Start difference. First operand 3556 states and 5328 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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) [2021-11-09 09:35:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:52,670 INFO L93 Difference]: Finished difference Result 9947 states and 14032 transitions. [2021-11-09 09:35:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:35:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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 64 [2021-11-09 09:35:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:52,695 INFO L225 Difference]: With dead ends: 9947 [2021-11-09 09:35:52,695 INFO L226 Difference]: Without dead ends: 8973 [2021-11-09 09:35:52,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:35:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2021-11-09 09:35:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 6690. [2021-11-09 09:35:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6690 states, 6688 states have (on average 1.4226973684210527) internal successors, (9515), 6689 states have internal predecessors, (9515), 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) [2021-11-09 09:35:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 9515 transitions. [2021-11-09 09:35:53,284 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 9515 transitions. Word has length 64 [2021-11-09 09:35:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:53,285 INFO L470 AbstractCegarLoop]: Abstraction has 6690 states and 9515 transitions. [2021-11-09 09:35:53,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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) [2021-11-09 09:35:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 9515 transitions. [2021-11-09 09:35:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:35:53,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:53,287 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:53,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:53,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:53,503 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:53,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2021-11-09 09:35:53,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:53,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279564021] [2021-11-09 09:35:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:53,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:53,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:53,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279564021] [2021-11-09 09:35:53,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279564021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:53,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165992521] [2021-11-09 09:35:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:53,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:53,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:53,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:35:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:35:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:55,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165992521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:55,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:55,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:35:55,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758525862] [2021-11-09 09:35:55,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:35:55,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:35:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:35:55,457 INFO L87 Difference]: Start difference. First operand 6690 states and 9515 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 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) [2021-11-09 09:36:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:00,228 INFO L93 Difference]: Finished difference Result 28970 states and 39253 transitions. [2021-11-09 09:36:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:36:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 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 65 [2021-11-09 09:36:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:00,291 INFO L225 Difference]: With dead ends: 28970 [2021-11-09 09:36:00,291 INFO L226 Difference]: Without dead ends: 24560 [2021-11-09 09:36:00,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:36:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24560 states. [2021-11-09 09:36:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24560 to 11970. [2021-11-09 09:36:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11970 states, 11968 states have (on average 1.3722426470588236) internal successors, (16423), 11969 states have internal predecessors, (16423), 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) [2021-11-09 09:36:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11970 states to 11970 states and 16423 transitions. [2021-11-09 09:36:01,751 INFO L78 Accepts]: Start accepts. Automaton has 11970 states and 16423 transitions. Word has length 65 [2021-11-09 09:36:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:01,751 INFO L470 AbstractCegarLoop]: Abstraction has 11970 states and 16423 transitions. [2021-11-09 09:36:01,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 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) [2021-11-09 09:36:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11970 states and 16423 transitions. [2021-11-09 09:36:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:36:01,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:01,754 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:01,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:01,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:36:01,972 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2021-11-09 09:36:01,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:01,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266763971] [2021-11-09 09:36:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:01,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:02,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:02,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266763971] [2021-11-09 09:36:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266763971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:02,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793727544] [2021-11-09 09:36:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:02,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:02,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:02,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:02,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:36:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:36:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:03,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793727544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:03,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:03,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:36:03,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38955071] [2021-11-09 09:36:03,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:36:03,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:36:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:36:03,833 INFO L87 Difference]: Start difference. First operand 11970 states and 16423 transitions. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 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) [2021-11-09 09:36:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:08,675 INFO L93 Difference]: Finished difference Result 53066 states and 70061 transitions. [2021-11-09 09:36:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:36:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 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 65 [2021-11-09 09:36:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:08,794 INFO L225 Difference]: With dead ends: 53066 [2021-11-09 09:36:08,794 INFO L226 Difference]: Without dead ends: 43376 [2021-11-09 09:36:08,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:36:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43376 states. [2021-11-09 09:36:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43376 to 28724. [2021-11-09 09:36:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28724 states, 28722 states have (on average 1.3289116356799666) internal successors, (38169), 28723 states have internal predecessors, (38169), 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) [2021-11-09 09:36:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28724 states to 28724 states and 38169 transitions. [2021-11-09 09:36:11,619 INFO L78 Accepts]: Start accepts. Automaton has 28724 states and 38169 transitions. Word has length 65 [2021-11-09 09:36:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:11,619 INFO L470 AbstractCegarLoop]: Abstraction has 28724 states and 38169 transitions. [2021-11-09 09:36:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 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) [2021-11-09 09:36:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28724 states and 38169 transitions. [2021-11-09 09:36:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:36:11,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:11,623 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] [2021-11-09 09:36:11,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:11,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:36:11,839 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2021-11-09 09:36:11,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:11,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967124886] [2021-11-09 09:36:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:11,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:11,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:11,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967124886] [2021-11-09 09:36:11,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967124886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:11,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:11,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:11,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212804952] [2021-11-09 09:36:11,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:11,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:11,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:11,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:11,942 INFO L87 Difference]: Start difference. First operand 28724 states and 38169 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-09 09:36:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:13,756 INFO L93 Difference]: Finished difference Result 40182 states and 53161 transitions. [2021-11-09 09:36:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-09 09:36:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:13,796 INFO L225 Difference]: With dead ends: 40182 [2021-11-09 09:36:13,796 INFO L226 Difference]: Without dead ends: 13738 [2021-11-09 09:36:13,837 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 [2021-11-09 09:36:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2021-11-09 09:36:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 12861. [2021-11-09 09:36:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12859 states have (on average 1.3370402053036783) internal successors, (17193), 12860 states have internal predecessors, (17193), 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) [2021-11-09 09:36:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17193 transitions. [2021-11-09 09:36:15,242 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17193 transitions. Word has length 65 [2021-11-09 09:36:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:15,243 INFO L470 AbstractCegarLoop]: Abstraction has 12861 states and 17193 transitions. [2021-11-09 09:36:15,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-09 09:36:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17193 transitions. [2021-11-09 09:36:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:36:15,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:15,246 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:15,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:36:15,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2021-11-09 09:36:15,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:15,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899556201] [2021-11-09 09:36:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:15,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:36:15,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:15,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899556201] [2021-11-09 09:36:15,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899556201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:15,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:15,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020353587] [2021-11-09 09:36:15,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:15,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:15,328 INFO L87 Difference]: Start difference. First operand 12861 states and 17193 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-11-09 09:36:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:16,734 INFO L93 Difference]: Finished difference Result 21652 states and 28566 transitions. [2021-11-09 09:36:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:16,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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 65 [2021-11-09 09:36:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:16,765 INFO L225 Difference]: With dead ends: 21652 [2021-11-09 09:36:16,766 INFO L226 Difference]: Without dead ends: 11144 [2021-11-09 09:36:16,779 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 [2021-11-09 09:36:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2021-11-09 09:36:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 11144. [2021-11-09 09:36:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11142 states have (on average 1.3243582839705619) internal successors, (14756), 11143 states have internal predecessors, (14756), 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) [2021-11-09 09:36:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 14756 transitions. [2021-11-09 09:36:17,865 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 14756 transitions. Word has length 65 [2021-11-09 09:36:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 11144 states and 14756 transitions. [2021-11-09 09:36:17,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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) [2021-11-09 09:36:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 14756 transitions. [2021-11-09 09:36:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:36:17,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:17,869 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:17,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:36:17,869 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2021-11-09 09:36:17,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:17,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613617420] [2021-11-09 09:36:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:17,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:17,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:17,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613617420] [2021-11-09 09:36:17,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613617420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:17,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:17,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:17,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873122534] [2021-11-09 09:36:17,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:17,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:17,942 INFO L87 Difference]: Start difference. First operand 11144 states and 14756 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-09 09:36:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:18,772 INFO L93 Difference]: Finished difference Result 17701 states and 23072 transitions. [2021-11-09 09:36:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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 65 [2021-11-09 09:36:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:18,795 INFO L225 Difference]: With dead ends: 17701 [2021-11-09 09:36:18,796 INFO L226 Difference]: Without dead ends: 8948 [2021-11-09 09:36:18,806 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 [2021-11-09 09:36:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8948 states. [2021-11-09 09:36:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8948 to 8948. [2021-11-09 09:36:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8948 states, 8946 states have (on average 1.323943661971831) internal successors, (11844), 8947 states have internal predecessors, (11844), 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) [2021-11-09 09:36:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 11844 transitions. [2021-11-09 09:36:19,830 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 11844 transitions. Word has length 65 [2021-11-09 09:36:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:19,831 INFO L470 AbstractCegarLoop]: Abstraction has 8948 states and 11844 transitions. [2021-11-09 09:36:19,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-09 09:36:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 11844 transitions. [2021-11-09 09:36:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:36:19,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:19,834 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:19,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:36:19,835 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2021-11-09 09:36:19,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:19,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318561984] [2021-11-09 09:36:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:19,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:36:19,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:19,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318561984] [2021-11-09 09:36:19,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318561984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:19,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:19,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:19,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728229706] [2021-11-09 09:36:19,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:19,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:19,916 INFO L87 Difference]: Start difference. First operand 8948 states and 11844 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-09 09:36:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:20,862 INFO L93 Difference]: Finished difference Result 14114 states and 18317 transitions. [2021-11-09 09:36:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 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 65 [2021-11-09 09:36:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:20,880 INFO L225 Difference]: With dead ends: 14114 [2021-11-09 09:36:20,881 INFO L226 Difference]: Without dead ends: 7481 [2021-11-09 09:36:20,890 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 [2021-11-09 09:36:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-11-09 09:36:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 7481. [2021-11-09 09:36:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 7479 states have (on average 1.3337344564781388) internal successors, (9975), 7480 states have internal predecessors, (9975), 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) [2021-11-09 09:36:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 9975 transitions. [2021-11-09 09:36:21,813 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 9975 transitions. Word has length 65 [2021-11-09 09:36:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:21,814 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 9975 transitions. [2021-11-09 09:36:21,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-09 09:36:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 9975 transitions. [2021-11-09 09:36:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:36:21,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:21,815 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:21,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:36:21,816 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2021-11-09 09:36:21,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:21,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835862589] [2021-11-09 09:36:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:21,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:22,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:22,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835862589] [2021-11-09 09:36:22,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835862589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:22,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866926760] [2021-11-09 09:36:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:22,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:22,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:22,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:36:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:36:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:28,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866926760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:28,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:28,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:36:28,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478157584] [2021-11-09 09:36:28,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:36:28,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:36:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:36:28,231 INFO L87 Difference]: Start difference. First operand 7481 states and 9975 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2021-11-09 09:36:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:35,359 INFO L93 Difference]: Finished difference Result 11044 states and 14520 transitions. [2021-11-09 09:36:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:36:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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 66 [2021-11-09 09:36:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:35,376 INFO L225 Difference]: With dead ends: 11044 [2021-11-09 09:36:35,377 INFO L226 Difference]: Without dead ends: 8986 [2021-11-09 09:36:35,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1147, Invalid=6163, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:36:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8986 states. [2021-11-09 09:36:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8986 to 7344. [2021-11-09 09:36:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7344 states, 7342 states have (on average 1.3398256605829475) internal successors, (9837), 7343 states have internal predecessors, (9837), 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) [2021-11-09 09:36:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7344 states to 7344 states and 9837 transitions. [2021-11-09 09:36:36,324 INFO L78 Accepts]: Start accepts. Automaton has 7344 states and 9837 transitions. Word has length 66 [2021-11-09 09:36:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 7344 states and 9837 transitions. [2021-11-09 09:36:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2021-11-09 09:36:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7344 states and 9837 transitions. [2021-11-09 09:36:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 09:36:36,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:36,326 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:36,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:36:36,527 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2021-11-09 09:36:36,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:36,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675060957] [2021-11-09 09:36:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:36,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:37,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:37,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675060957] [2021-11-09 09:36:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675060957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:37,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821118449] [2021-11-09 09:36:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:37,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:37,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:37,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:36:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:36:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:45,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821118449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:45,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:45,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:36:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894375792] [2021-11-09 09:36:45,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:36:45,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:36:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:36:45,358 INFO L87 Difference]: Start difference. First operand 7344 states and 9837 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2021-11-09 09:37:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:04,314 INFO L93 Difference]: Finished difference Result 12837 states and 16623 transitions. [2021-11-09 09:37:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 09:37:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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 66 [2021-11-09 09:37:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:04,328 INFO L225 Difference]: With dead ends: 12837 [2021-11-09 09:37:04,328 INFO L226 Difference]: Without dead ends: 11221 [2021-11-09 09:37:04,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 09:37:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11221 states. [2021-11-09 09:37:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11221 to 7422. [2021-11-09 09:37:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7422 states, 7420 states have (on average 1.3411051212938006) internal successors, (9951), 7421 states have internal predecessors, (9951), 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) [2021-11-09 09:37:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7422 states to 7422 states and 9951 transitions. [2021-11-09 09:37:05,255 INFO L78 Accepts]: Start accepts. Automaton has 7422 states and 9951 transitions. Word has length 66 [2021-11-09 09:37:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:05,255 INFO L470 AbstractCegarLoop]: Abstraction has 7422 states and 9951 transitions. [2021-11-09 09:37:05,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 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) [2021-11-09 09:37:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 7422 states and 9951 transitions. [2021-11-09 09:37:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:37:05,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:05,257 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:05,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:05,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:37:05,458 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 184750935, now seen corresponding path program 1 times [2021-11-09 09:37:05,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:05,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178007252] [2021-11-09 09:37:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:05,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:05,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:05,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178007252] [2021-11-09 09:37:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178007252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:05,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804044585] [2021-11-09 09:37:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:05,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:05,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:37:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:37:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804044585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:09,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:09,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-11-09 09:37:09,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174926473] [2021-11-09 09:37:09,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:37:09,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:37:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:37:09,221 INFO L87 Difference]: Start difference. First operand 7422 states and 9951 transitions. Second operand has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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) [2021-11-09 09:37:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:14,742 INFO L93 Difference]: Finished difference Result 9903 states and 13116 transitions. [2021-11-09 09:37:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 09:37:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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 [2021-11-09 09:37:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:14,755 INFO L225 Difference]: With dead ends: 9903 [2021-11-09 09:37:14,755 INFO L226 Difference]: Without dead ends: 7603 [2021-11-09 09:37:14,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=908, Invalid=4204, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:37:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2021-11-09 09:37:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 6585. [2021-11-09 09:37:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6585 states, 6583 states have (on average 1.351511468935136) internal successors, (8897), 6584 states have internal predecessors, (8897), 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) [2021-11-09 09:37:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6585 states to 6585 states and 8897 transitions. [2021-11-09 09:37:15,403 INFO L78 Accepts]: Start accepts. Automaton has 6585 states and 8897 transitions. Word has length 67 [2021-11-09 09:37:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:15,403 INFO L470 AbstractCegarLoop]: Abstraction has 6585 states and 8897 transitions. [2021-11-09 09:37:15,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 states have internal predecessors, (113), 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) [2021-11-09 09:37:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6585 states and 8897 transitions. [2021-11-09 09:37:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:37:15,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:15,405 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:15,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:37:15,619 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 176449111, now seen corresponding path program 1 times [2021-11-09 09:37:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:15,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784425715] [2021-11-09 09:37:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:15,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:16,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:16,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784425715] [2021-11-09 09:37:16,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784425715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:16,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606490717] [2021-11-09 09:37:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:16,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:16,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:16,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:37:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:37:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:18,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606490717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:18,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:18,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-11-09 09:37:18,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991266818] [2021-11-09 09:37:18,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:37:18,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:37:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:37:18,875 INFO L87 Difference]: Start difference. First operand 6585 states and 8897 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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) [2021-11-09 09:37:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:22,220 INFO L93 Difference]: Finished difference Result 10767 states and 14258 transitions. [2021-11-09 09:37:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:37:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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 [2021-11-09 09:37:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:22,234 INFO L225 Difference]: With dead ends: 10767 [2021-11-09 09:37:22,235 INFO L226 Difference]: Without dead ends: 8728 [2021-11-09 09:37:22,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:37:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-11-09 09:37:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 5708. [2021-11-09 09:37:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5708 states, 5706 states have (on average 1.3697861899754644) internal successors, (7816), 5707 states have internal predecessors, (7816), 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) [2021-11-09 09:37:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5708 states to 5708 states and 7816 transitions. [2021-11-09 09:37:22,872 INFO L78 Accepts]: Start accepts. Automaton has 5708 states and 7816 transitions. Word has length 67 [2021-11-09 09:37:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:22,873 INFO L470 AbstractCegarLoop]: Abstraction has 5708 states and 7816 transitions. [2021-11-09 09:37:22,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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) [2021-11-09 09:37:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5708 states and 7816 transitions. [2021-11-09 09:37:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 09:37:22,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:22,875 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] [2021-11-09 09:37:22,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:23,076 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 561901135, now seen corresponding path program 1 times [2021-11-09 09:37:23,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:23,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420608000] [2021-11-09 09:37:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:23,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:23,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:23,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420608000] [2021-11-09 09:37:23,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420608000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:23,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3611260] [2021-11-09 09:37:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:23,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:23,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:23,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:37:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:24,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:37:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3611260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:27,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:27,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 09:37:27,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789517699] [2021-11-09 09:37:27,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:37:27,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:37:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:37:27,240 INFO L87 Difference]: Start difference. First operand 5708 states and 7816 transitions. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 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) [2021-11-09 09:37:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:30,122 INFO L93 Difference]: Finished difference Result 7978 states and 10601 transitions. [2021-11-09 09:37:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:37:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 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 68 [2021-11-09 09:37:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:30,130 INFO L225 Difference]: With dead ends: 7978 [2021-11-09 09:37:30,130 INFO L226 Difference]: Without dead ends: 6189 [2021-11-09 09:37:30,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:37:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2021-11-09 09:37:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 4856. [2021-11-09 09:37:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4854 states have (on average 1.3955500618046972) internal successors, (6774), 4855 states have internal predecessors, (6774), 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) [2021-11-09 09:37:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 6774 transitions. [2021-11-09 09:37:30,603 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 6774 transitions. Word has length 68 [2021-11-09 09:37:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:30,603 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 6774 transitions. [2021-11-09 09:37:30,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 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) [2021-11-09 09:37:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 6774 transitions. [2021-11-09 09:37:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:37:30,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:30,606 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:30,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:30,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:30,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1362039845, now seen corresponding path program 1 times [2021-11-09 09:37:30,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:30,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362298529] [2021-11-09 09:37:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:30,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:31,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:31,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362298529] [2021-11-09 09:37:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362298529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:31,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809882295] [2021-11-09 09:37:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:31,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:31,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:31,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e226d35a-f2b7-4679-9276-41eb22b7b2b2/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:37:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:37:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 68 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:20,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809882295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:20,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:20,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 09:38:20,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946882980] [2021-11-09 09:38:20,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:38:20,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:38:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=347, Unknown=21, NotChecked=0, Total=420 [2021-11-09 09:38:20,476 INFO L87 Difference]: Start difference. First operand 4856 states and 6774 transitions. Second operand has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 20 states have internal predecessors, (204), 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)