./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF --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 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:46:24,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:46:24,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:46:24,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:46:24,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:46:24,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:46:24,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:46:24,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:46:24,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:46:24,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:46:24,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:46:24,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:46:24,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:46:24,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:46:24,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:46:24,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:46:24,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:46:24,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:46:24,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:46:24,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:46:24,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:46:24,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:46:24,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:46:24,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:46:24,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:46:24,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:46:24,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:46:24,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:46:24,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:46:24,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:46:24,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:46:24,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:46:24,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:46:24,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:46:24,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:46:24,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:46:24,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:46:24,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:46:24,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:46:24,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:46:24,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:46:24,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:46:24,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:46:24,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:46:24,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:46:24,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:46:24,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:46:24,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:46:24,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:46:24,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:46:24,862 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:46:24,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:46:24,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:46:24,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:46:24,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:46:24,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:46:24,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:46:24,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:46:24,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:46:24,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:46:24,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:46:24,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:46:24,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:46:24,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:46:24,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:46:24,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:46:24,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:46:24,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:46:24,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:46:24,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:46:24,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:46:24,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:46:24,870 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:46:24,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:46:24,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:46:24,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:46:24,871 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_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 [2021-11-20 06:46:25,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:46:25,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:46:25,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:46:25,150 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:46:25,151 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:46:25,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2021-11-20 06:46:25,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/data/c41867816/fa97aa7c1e16406ea7356f835ddd9f11/FLAG41f436f07 [2021-11-20 06:46:26,009 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:46:26,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2021-11-20 06:46:26,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/data/c41867816/fa97aa7c1e16406ea7356f835ddd9f11/FLAG41f436f07 [2021-11-20 06:46:26,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/data/c41867816/fa97aa7c1e16406ea7356f835ddd9f11 [2021-11-20 06:46:26,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:46:26,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:46:26,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:46:26,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:46:26,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:46:26,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:46:26" (1/1) ... [2021-11-20 06:46:26,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37653865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:26, skipping insertion in model container [2021-11-20 06:46:26,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:46:26" (1/1) ... [2021-11-20 06:46:26,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:46:26,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:46:26,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/sv-benchmarks/c/eca-rers2012/Problem17_label16.c[3929,3942] [2021-11-20 06:46:27,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:46:27,223 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:46:27,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/sv-benchmarks/c/eca-rers2012/Problem17_label16.c[3929,3942] [2021-11-20 06:46:27,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:46:27,663 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:46:27,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27 WrapperNode [2021-11-20 06:46:27,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:46:27,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:46:27,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:46:27,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:46:27,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:27,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,108 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-20 06:46:28,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:46:28,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:46:28,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:46:28,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:46:28,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:46:28,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:46:28,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:46:28,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:46:28,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (1/1) ... [2021-11-20 06:46:28,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:46:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:28,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:46:28,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:46:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:46:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:46:28,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:46:28,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:46:28,644 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:46:28,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:46:32,567 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:46:32,616 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:46:32,619 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:46:32,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:46:32 BoogieIcfgContainer [2021-11-20 06:46:32,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:46:32,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:46:32,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:46:32,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:46:32,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:46:26" (1/3) ... [2021-11-20 06:46:32,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76392263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:46:32, skipping insertion in model container [2021-11-20 06:46:32,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:27" (2/3) ... [2021-11-20 06:46:32,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76392263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:46:32, skipping insertion in model container [2021-11-20 06:46:32,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:46:32" (3/3) ... [2021-11-20 06:46:32,635 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label16.c [2021-11-20 06:46:32,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:46:32,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:46:32,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:46:32,740 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 [2021-11-20 06:46:32,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:46:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:46:32,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:32,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:32,801 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2021-11-20 06:46:32,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259031987] [2021-11-20 06:46:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:32,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:33,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259031987] [2021-11-20 06:46:33,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259031987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:33,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:33,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:46:33,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244081762] [2021-11-20 06:46:33,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:33,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:33,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:33,096 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:37,206 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-20 06:46:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:37,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 25 [2021-11-20 06:46:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:37,252 INFO L225 Difference]: With dead ends: 1644 [2021-11-20 06:46:37,252 INFO L226 Difference]: Without dead ends: 977 [2021-11-20 06:46:37,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:37,266 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 463 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:37,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:46:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-20 06:46:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-20 06:46:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-20 06:46:37,373 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 25 [2021-11-20 06:46:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:37,378 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-20 06:46:37,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-20 06:46:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 06:46:37,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:37,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:37,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:46:37,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1947080830, now seen corresponding path program 1 times [2021-11-20 06:46:37,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:37,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687680975] [2021-11-20 06:46:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:37,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:37,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:37,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687680975] [2021-11-20 06:46:37,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687680975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:37,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:37,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:46:37,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673786510] [2021-11-20 06:46:37,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:37,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:37,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:37,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:37,554 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:40,778 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-11-20 06:46:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 92 [2021-11-20 06:46:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:40,792 INFO L225 Difference]: With dead ends: 2813 [2021-11-20 06:46:40,792 INFO L226 Difference]: Without dead ends: 1844 [2021-11-20 06:46:40,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:40,796 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:40,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:46:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-20 06:46:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-11-20 06:46:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-11-20 06:46:40,858 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 92 [2021-11-20 06:46:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-11-20 06:46:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-11-20 06:46:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:46:40,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:40,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:40,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:46:40,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1701944076, now seen corresponding path program 1 times [2021-11-20 06:46:40,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260394329] [2021-11-20 06:46:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:40,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:41,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260394329] [2021-11-20 06:46:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260394329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:41,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:41,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:41,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173594195] [2021-11-20 06:46:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:41,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:41,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:41,097 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:46,769 INFO L93 Difference]: Finished difference Result 6767 states and 9259 transitions. [2021-11-20 06:46:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:46,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 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 95 [2021-11-20 06:46:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:46,803 INFO L225 Difference]: With dead ends: 6767 [2021-11-20 06:46:46,803 INFO L226 Difference]: Without dead ends: 4928 [2021-11-20 06:46:46,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:46,809 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 890 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:46,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 328 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 06:46:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-11-20 06:46:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4875. [2021-11-20 06:46:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.2866228970045137) internal successors, (6271), 4874 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6271 transitions. [2021-11-20 06:46:46,957 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6271 transitions. Word has length 95 [2021-11-20 06:46:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:46,958 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6271 transitions. [2021-11-20 06:46:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6271 transitions. [2021-11-20 06:46:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 06:46:46,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:46,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:46,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:46:46,982 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -106790988, now seen corresponding path program 1 times [2021-11-20 06:46:46,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:46,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368764161] [2021-11-20 06:46:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:46,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:46:47,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:47,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368764161] [2021-11-20 06:46:47,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368764161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:47,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:46:47,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690198989] [2021-11-20 06:46:47,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:47,210 INFO L87 Difference]: Start difference. First operand 4875 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:49,581 INFO L93 Difference]: Finished difference Result 14436 states and 18544 transitions. [2021-11-20 06:46:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 164 [2021-11-20 06:46:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:49,634 INFO L225 Difference]: With dead ends: 14436 [2021-11-20 06:46:49,634 INFO L226 Difference]: Without dead ends: 8277 [2021-11-20 06:46:49,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:49,646 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:49,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-11-20 06:46:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6576. [2021-11-20 06:46:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 1.1793155893536122) internal successors, (7754), 6575 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 7754 transitions. [2021-11-20 06:46:49,908 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 7754 transitions. Word has length 164 [2021-11-20 06:46:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:49,909 INFO L470 AbstractCegarLoop]: Abstraction has 6576 states and 7754 transitions. [2021-11-20 06:46:49,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 7754 transitions. [2021-11-20 06:46:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:46:49,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:49,913 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:46:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:46:49,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1141369514, now seen corresponding path program 1 times [2021-11-20 06:46:49,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:49,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466546454] [2021-11-20 06:46:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:49,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:50,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466546454] [2021-11-20 06:46:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466546454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:50,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133757681] [2021-11-20 06:46:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:50,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:50,042 INFO L87 Difference]: Start difference. First operand 6576 states and 7754 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:52,214 INFO L93 Difference]: Finished difference Result 16560 states and 19931 transitions. [2021-11-20 06:46:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 177 [2021-11-20 06:46:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:52,351 INFO L225 Difference]: With dead ends: 16560 [2021-11-20 06:46:52,351 INFO L226 Difference]: Without dead ends: 9986 [2021-11-20 06:46:52,362 INFO L932 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 [2021-11-20 06:46:52,367 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:52,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:46:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-11-20 06:46:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2021-11-20 06:46:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.1696544817225838) internal successors, (11679), 9985 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 11679 transitions. [2021-11-20 06:46:52,605 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 11679 transitions. Word has length 177 [2021-11-20 06:46:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:52,606 INFO L470 AbstractCegarLoop]: Abstraction has 9986 states and 11679 transitions. [2021-11-20 06:46:52,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 11679 transitions. [2021-11-20 06:46:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:46:52,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:52,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:46:52,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:46:52,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash 3113787, now seen corresponding path program 1 times [2021-11-20 06:46:52,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217600526] [2021-11-20 06:46:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:52,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:46:52,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217600526] [2021-11-20 06:46:52,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217600526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:52,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:52,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:52,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938501179] [2021-11-20 06:46:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:52,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:52,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:52,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:52,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:52,790 INFO L87 Difference]: Start difference. First operand 9986 states and 11679 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:55,795 INFO L93 Difference]: Finished difference Result 25067 states and 29587 transitions. [2021-11-20 06:46:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 179 [2021-11-20 06:46:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:55,834 INFO L225 Difference]: With dead ends: 25067 [2021-11-20 06:46:55,834 INFO L226 Difference]: Without dead ends: 15083 [2021-11-20 06:46:55,847 INFO L932 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 [2021-11-20 06:46:55,849 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 429 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 486 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 06:46:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15083 states. [2021-11-20 06:46:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15083 to 10384. [2021-11-20 06:46:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10384 states, 10383 states have (on average 1.1651738418568813) internal successors, (12098), 10383 states have internal predecessors, (12098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10384 states to 10384 states and 12098 transitions. [2021-11-20 06:46:56,082 INFO L78 Accepts]: Start accepts. Automaton has 10384 states and 12098 transitions. Word has length 179 [2021-11-20 06:46:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:56,083 INFO L470 AbstractCegarLoop]: Abstraction has 10384 states and 12098 transitions. [2021-11-20 06:46:56,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10384 states and 12098 transitions. [2021-11-20 06:46:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 06:46:56,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:56,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:56,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:46:56,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1690682791, now seen corresponding path program 1 times [2021-11-20 06:46:56,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:56,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428373207] [2021-11-20 06:46:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:56,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:46:56,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428373207] [2021-11-20 06:46:56,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428373207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:56,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:56,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:56,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042412916] [2021-11-20 06:46:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:56,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:56,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:56,206 INFO L87 Difference]: Start difference. First operand 10384 states and 12098 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:59,159 INFO L93 Difference]: Finished difference Result 25874 states and 30417 transitions. [2021-11-20 06:46:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:59,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 192 [2021-11-20 06:46:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:59,206 INFO L225 Difference]: With dead ends: 25874 [2021-11-20 06:46:59,206 INFO L226 Difference]: Without dead ends: 15492 [2021-11-20 06:46:59,219 INFO L932 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 [2021-11-20 06:46:59,220 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 453 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:59,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 448 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:46:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15492 states. [2021-11-20 06:46:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15492 to 13778. [2021-11-20 06:46:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13778 states, 13777 states have (on average 1.166509399724178) internal successors, (16071), 13777 states have internal predecessors, (16071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13778 states to 13778 states and 16071 transitions. [2021-11-20 06:46:59,476 INFO L78 Accepts]: Start accepts. Automaton has 13778 states and 16071 transitions. Word has length 192 [2021-11-20 06:46:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:59,478 INFO L470 AbstractCegarLoop]: Abstraction has 13778 states and 16071 transitions. [2021-11-20 06:46:59,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13778 states and 16071 transitions. [2021-11-20 06:46:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-20 06:46:59,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:59,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-11-20 06:46:59,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:46:59,485 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1691584357, now seen corresponding path program 1 times [2021-11-20 06:46:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:59,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027244489] [2021-11-20 06:46:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:59,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:46:59,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:59,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027244489] [2021-11-20 06:46:59,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027244489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:59,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:59,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:59,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30247862] [2021-11-20 06:46:59,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:59,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:59,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:59,651 INFO L87 Difference]: Start difference. First operand 13778 states and 16071 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:02,851 INFO L93 Difference]: Finished difference Result 32234 states and 37932 transitions. [2021-11-20 06:47:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:02,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 224 [2021-11-20 06:47:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:02,890 INFO L225 Difference]: With dead ends: 32234 [2021-11-20 06:47:02,890 INFO L226 Difference]: Without dead ends: 18458 [2021-11-20 06:47:02,905 INFO L932 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 [2021-11-20 06:47:02,906 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 467 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:02,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 416 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:47:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-11-20 06:47:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 17176. [2021-11-20 06:47:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17176 states, 17175 states have (on average 1.1833478893740903) internal successors, (20324), 17175 states have internal predecessors, (20324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17176 states to 17176 states and 20324 transitions. [2021-11-20 06:47:03,197 INFO L78 Accepts]: Start accepts. Automaton has 17176 states and 20324 transitions. Word has length 224 [2021-11-20 06:47:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:03,199 INFO L470 AbstractCegarLoop]: Abstraction has 17176 states and 20324 transitions. [2021-11-20 06:47:03,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 17176 states and 20324 transitions. [2021-11-20 06:47:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 06:47:03,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:03,204 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:03,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:47:03,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 852276715, now seen corresponding path program 1 times [2021-11-20 06:47:03,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:03,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519081320] [2021-11-20 06:47:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:03,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:03,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519081320] [2021-11-20 06:47:03,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519081320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:03,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:03,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:03,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827097097] [2021-11-20 06:47:03,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:03,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:03,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:03,356 INFO L87 Difference]: Start difference. First operand 17176 states and 20324 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:06,042 INFO L93 Difference]: Finished difference Result 39057 states and 46415 transitions. [2021-11-20 06:47:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 241 [2021-11-20 06:47:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:06,096 INFO L225 Difference]: With dead ends: 39057 [2021-11-20 06:47:06,096 INFO L226 Difference]: Without dead ends: 21458 [2021-11-20 06:47:06,113 INFO L932 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 [2021-11-20 06:47:06,114 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 356 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:06,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 864 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:47:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21458 states. [2021-11-20 06:47:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21458 to 21025. [2021-11-20 06:47:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21025 states, 21024 states have (on average 1.1667142313546424) internal successors, (24529), 21024 states have internal predecessors, (24529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21025 states to 21025 states and 24529 transitions. [2021-11-20 06:47:06,452 INFO L78 Accepts]: Start accepts. Automaton has 21025 states and 24529 transitions. Word has length 241 [2021-11-20 06:47:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:06,452 INFO L470 AbstractCegarLoop]: Abstraction has 21025 states and 24529 transitions. [2021-11-20 06:47:06,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21025 states and 24529 transitions. [2021-11-20 06:47:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-20 06:47:06,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:06,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:06,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:47:06,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1233843982, now seen corresponding path program 1 times [2021-11-20 06:47:06,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256825423] [2021-11-20 06:47:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:06,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:47:06,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256825423] [2021-11-20 06:47:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256825423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747708692] [2021-11-20 06:47:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:06,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:06,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:06,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:47:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:47:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:47:08,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:47:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747708692] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:08,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-20 06:47:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526723774] [2021-11-20 06:47:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:47:08,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:47:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:08,868 INFO L87 Difference]: Start difference. First operand 21025 states and 24529 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:13,114 INFO L93 Difference]: Finished difference Result 59100 states and 69388 transitions. [2021-11-20 06:47:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 249 [2021-11-20 06:47:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:13,179 INFO L225 Difference]: With dead ends: 59100 [2021-11-20 06:47:13,179 INFO L226 Difference]: Without dead ends: 37213 [2021-11-20 06:47:13,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:13,193 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 879 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:13,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 158 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 06:47:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37213 states. [2021-11-20 06:47:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37213 to 35506. [2021-11-20 06:47:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35506 states, 35505 states have (on average 1.1591043514997887) internal successors, (41154), 35505 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35506 states to 35506 states and 41154 transitions. [2021-11-20 06:47:13,674 INFO L78 Accepts]: Start accepts. Automaton has 35506 states and 41154 transitions. Word has length 249 [2021-11-20 06:47:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:13,675 INFO L470 AbstractCegarLoop]: Abstraction has 35506 states and 41154 transitions. [2021-11-20 06:47:13,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35506 states and 41154 transitions. [2021-11-20 06:47:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-20 06:47:13,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:13,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:13,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:13,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:47:13,905 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1742275879, now seen corresponding path program 1 times [2021-11-20 06:47:13,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192254986] [2021-11-20 06:47:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:13,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 06:47:14,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192254986] [2021-11-20 06:47:14,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192254986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:14,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:14,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:14,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403818732] [2021-11-20 06:47:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:14,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:14,049 INFO L87 Difference]: Start difference. First operand 35506 states and 41154 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:16,428 INFO L93 Difference]: Finished difference Result 78654 states and 91329 transitions. [2021-11-20 06:47:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 257 [2021-11-20 06:47:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:16,491 INFO L225 Difference]: With dead ends: 78654 [2021-11-20 06:47:16,491 INFO L226 Difference]: Without dead ends: 42723 [2021-11-20 06:47:16,515 INFO L932 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 [2021-11-20 06:47:16,516 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 380 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:16,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 850 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:47:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-11-20 06:47:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 42723. [2021-11-20 06:47:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42723 states, 42722 states have (on average 1.1170825335892514) internal successors, (47724), 42722 states have internal predecessors, (47724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42723 states to 42723 states and 47724 transitions. [2021-11-20 06:47:17,444 INFO L78 Accepts]: Start accepts. Automaton has 42723 states and 47724 transitions. Word has length 257 [2021-11-20 06:47:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:17,444 INFO L470 AbstractCegarLoop]: Abstraction has 42723 states and 47724 transitions. [2021-11-20 06:47:17,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42723 states and 47724 transitions. [2021-11-20 06:47:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-20 06:47:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:17,454 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:17,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:47:17,454 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2014465041, now seen corresponding path program 1 times [2021-11-20 06:47:17,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362685229] [2021-11-20 06:47:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:17,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:47:17,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:17,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362685229] [2021-11-20 06:47:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362685229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:17,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068720900] [2021-11-20 06:47:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:17,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:17,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:17,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:47:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:47:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:47:18,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:47:19,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068720900] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:19,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:19,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-20 06:47:19,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532892216] [2021-11-20 06:47:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:19,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:47:19,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:47:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:19,553 INFO L87 Difference]: Start difference. First operand 42723 states and 47724 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:23,863 INFO L93 Difference]: Finished difference Result 101643 states and 113664 transitions. [2021-11-20 06:47:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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 323 [2021-11-20 06:47:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:23,924 INFO L225 Difference]: With dead ends: 101643 [2021-11-20 06:47:23,924 INFO L226 Difference]: Without dead ends: 58493 [2021-11-20 06:47:23,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 641 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:23,948 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 841 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:23,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 189 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:47:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58493 states. [2021-11-20 06:47:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58493 to 55940. [2021-11-20 06:47:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55940 states, 55939 states have (on average 1.1210604408373406) internal successors, (62711), 55939 states have internal predecessors, (62711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55940 states to 55940 states and 62711 transitions. [2021-11-20 06:47:24,871 INFO L78 Accepts]: Start accepts. Automaton has 55940 states and 62711 transitions. Word has length 323 [2021-11-20 06:47:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:24,872 INFO L470 AbstractCegarLoop]: Abstraction has 55940 states and 62711 transitions. [2021-11-20 06:47:24,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 55940 states and 62711 transitions. [2021-11-20 06:47:24,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-20 06:47:24,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:24,885 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1] [2021-11-20 06:47:24,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:25,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:47:25,113 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1093920703, now seen corresponding path program 1 times [2021-11-20 06:47:25,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873771796] [2021-11-20 06:47:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:25,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 06:47:25,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873771796] [2021-11-20 06:47:25,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873771796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:25,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:25,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:25,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580545862] [2021-11-20 06:47:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:25,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:25,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:25,604 INFO L87 Difference]: Start difference. First operand 55940 states and 62711 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:28,109 INFO L93 Difference]: Finished difference Result 121241 states and 135987 transitions. [2021-11-20 06:47:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 420 [2021-11-20 06:47:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:28,198 INFO L225 Difference]: With dead ends: 121241 [2021-11-20 06:47:28,198 INFO L226 Difference]: Without dead ends: 64878 [2021-11-20 06:47:28,236 INFO L932 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 [2021-11-20 06:47:28,242 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:28,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 774 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:47:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64878 states. [2021-11-20 06:47:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64878 to 53350. [2021-11-20 06:47:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53350 states, 53349 states have (on average 1.1076871169094078) internal successors, (59094), 53349 states have internal predecessors, (59094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53350 states to 53350 states and 59094 transitions. [2021-11-20 06:47:29,186 INFO L78 Accepts]: Start accepts. Automaton has 53350 states and 59094 transitions. Word has length 420 [2021-11-20 06:47:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:29,187 INFO L470 AbstractCegarLoop]: Abstraction has 53350 states and 59094 transitions. [2021-11-20 06:47:29,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 53350 states and 59094 transitions. [2021-11-20 06:47:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-20 06:47:29,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:29,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:29,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:47:29,201 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1117070252, now seen corresponding path program 1 times [2021-11-20 06:47:29,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336860814] [2021-11-20 06:47:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:29,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 06:47:29,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336860814] [2021-11-20 06:47:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336860814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:29,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191202446] [2021-11-20 06:47:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:29,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:29,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:29,376 INFO L87 Difference]: Start difference. First operand 53350 states and 59094 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:32,253 INFO L93 Difference]: Finished difference Result 119901 states and 132834 transitions. [2021-11-20 06:47:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:32,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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 421 [2021-11-20 06:47:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:32,319 INFO L225 Difference]: With dead ends: 119901 [2021-11-20 06:47:32,319 INFO L226 Difference]: Without dead ends: 63990 [2021-11-20 06:47:32,342 INFO L932 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 [2021-11-20 06:47:32,343 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 437 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:32,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 659 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:47:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63990 states. [2021-11-20 06:47:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63990 to 61851. [2021-11-20 06:47:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61851 states, 61850 states have (on average 1.0961196443007275) internal successors, (67795), 61850 states have internal predecessors, (67795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61851 states to 61851 states and 67795 transitions. [2021-11-20 06:47:33,359 INFO L78 Accepts]: Start accepts. Automaton has 61851 states and 67795 transitions. Word has length 421 [2021-11-20 06:47:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:33,360 INFO L470 AbstractCegarLoop]: Abstraction has 61851 states and 67795 transitions. [2021-11-20 06:47:33,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 61851 states and 67795 transitions. [2021-11-20 06:47:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-11-20 06:47:33,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:33,375 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-20 06:47:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:47:33,376 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash 377993779, now seen corresponding path program 1 times [2021-11-20 06:47:33,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373160466] [2021-11-20 06:47:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:33,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 573 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:47:33,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:33,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373160466] [2021-11-20 06:47:33,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373160466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:33,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:47:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522167955] [2021-11-20 06:47:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:33,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:47:33,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:47:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:47:33,567 INFO L87 Difference]: Start difference. First operand 61851 states and 67795 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:37,579 INFO L93 Difference]: Finished difference Result 145471 states and 159571 transitions. [2021-11-20 06:47:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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 425 [2021-11-20 06:47:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:37,667 INFO L225 Difference]: With dead ends: 145471 [2021-11-20 06:47:37,667 INFO L226 Difference]: Without dead ends: 83622 [2021-11-20 06:47:37,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:47:37,691 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 828 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:37,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 207 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:47:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83622 states. [2021-11-20 06:47:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83622 to 78925. [2021-11-20 06:47:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78925 states, 78924 states have (on average 1.097967665095535) internal successors, (86656), 78924 states have internal predecessors, (86656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78925 states to 78925 states and 86656 transitions. [2021-11-20 06:47:39,030 INFO L78 Accepts]: Start accepts. Automaton has 78925 states and 86656 transitions. Word has length 425 [2021-11-20 06:47:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:39,030 INFO L470 AbstractCegarLoop]: Abstraction has 78925 states and 86656 transitions. [2021-11-20 06:47:39,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78925 states and 86656 transitions. [2021-11-20 06:47:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-20 06:47:39,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:39,041 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:39,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:47:39,041 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1733652073, now seen corresponding path program 1 times [2021-11-20 06:47:39,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400476377] [2021-11-20 06:47:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:39,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 06:47:39,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400476377] [2021-11-20 06:47:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400476377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:39,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:39,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:39,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644250094] [2021-11-20 06:47:39,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:39,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:39,244 INFO L87 Difference]: Start difference. First operand 78925 states and 86656 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:42,135 INFO L93 Difference]: Finished difference Result 167643 states and 184228 transitions. [2021-11-20 06:47:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 444 [2021-11-20 06:47:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:42,236 INFO L225 Difference]: With dead ends: 167643 [2021-11-20 06:47:42,236 INFO L226 Difference]: Without dead ends: 88720 [2021-11-20 06:47:42,270 INFO L932 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 [2021-11-20 06:47:42,271 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 387 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:42,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 328 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:47:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88720 states. [2021-11-20 06:47:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88720 to 88286. [2021-11-20 06:47:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88286 states, 88285 states have (on average 1.0953389590530667) internal successors, (96702), 88285 states have internal predecessors, (96702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88286 states to 88286 states and 96702 transitions. [2021-11-20 06:47:43,785 INFO L78 Accepts]: Start accepts. Automaton has 88286 states and 96702 transitions. Word has length 444 [2021-11-20 06:47:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:43,786 INFO L470 AbstractCegarLoop]: Abstraction has 88286 states and 96702 transitions. [2021-11-20 06:47:43,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 88286 states and 96702 transitions. [2021-11-20 06:47:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-11-20 06:47:43,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:43,797 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:43,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:47:43,797 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1451937129, now seen corresponding path program 1 times [2021-11-20 06:47:43,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:43,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104630467] [2021-11-20 06:47:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:43,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-11-20 06:47:44,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104630467] [2021-11-20 06:47:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104630467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:44,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:44,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:44,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156019649] [2021-11-20 06:47:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:44,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:44,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:44,021 INFO L87 Difference]: Start difference. First operand 88286 states and 96702 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:46,870 INFO L93 Difference]: Finished difference Result 190190 states and 208577 transitions. [2021-11-20 06:47:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:46,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 468 [2021-11-20 06:47:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:47,004 INFO L225 Difference]: With dead ends: 190190 [2021-11-20 06:47:47,004 INFO L226 Difference]: Without dead ends: 101906 [2021-11-20 06:47:47,043 INFO L932 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 [2021-11-20 06:47:47,043 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 475 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:47,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 264 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:47:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101906 states. [2021-11-20 06:47:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101906 to 101449. [2021-11-20 06:47:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101449 states, 101448 states have (on average 1.0927963094393187) internal successors, (110862), 101448 states have internal predecessors, (110862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101449 states to 101449 states and 110862 transitions. [2021-11-20 06:47:48,785 INFO L78 Accepts]: Start accepts. Automaton has 101449 states and 110862 transitions. Word has length 468 [2021-11-20 06:47:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:48,785 INFO L470 AbstractCegarLoop]: Abstraction has 101449 states and 110862 transitions. [2021-11-20 06:47:48,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 101449 states and 110862 transitions. [2021-11-20 06:47:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-11-20 06:47:48,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:48,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:48,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:47:48,795 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1632310757, now seen corresponding path program 1 times [2021-11-20 06:47:48,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311383194] [2021-11-20 06:47:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:48,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-20 06:47:48,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:48,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311383194] [2021-11-20 06:47:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311383194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:48,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:48,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:48,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415170451] [2021-11-20 06:47:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:48,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:48,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:48,995 INFO L87 Difference]: Start difference. First operand 101449 states and 110862 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:52,036 INFO L93 Difference]: Finished difference Result 208447 states and 227581 transitions. [2021-11-20 06:47:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 471 [2021-11-20 06:47:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:52,178 INFO L225 Difference]: With dead ends: 208447 [2021-11-20 06:47:52,178 INFO L226 Difference]: Without dead ends: 105293 [2021-11-20 06:47:52,228 INFO L932 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 [2021-11-20 06:47:52,229 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 424 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:52,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 807 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:47:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105293 states. [2021-11-20 06:47:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105293 to 102292. [2021-11-20 06:47:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102292 states, 102291 states have (on average 1.0912103704138194) internal successors, (111621), 102291 states have internal predecessors, (111621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102292 states to 102292 states and 111621 transitions. [2021-11-20 06:47:54,263 INFO L78 Accepts]: Start accepts. Automaton has 102292 states and 111621 transitions. Word has length 471 [2021-11-20 06:47:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:54,263 INFO L470 AbstractCegarLoop]: Abstraction has 102292 states and 111621 transitions. [2021-11-20 06:47:54,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 102292 states and 111621 transitions. [2021-11-20 06:47:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-11-20 06:47:54,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:54,274 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:47:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:47:54,274 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1828137218, now seen corresponding path program 1 times [2021-11-20 06:47:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9253279] [2021-11-20 06:47:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:54,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-20 06:47:54,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9253279] [2021-11-20 06:47:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9253279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:54,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:47:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427553861] [2021-11-20 06:47:54,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:47:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:47:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:47:54,510 INFO L87 Difference]: Start difference. First operand 102292 states and 111621 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:58,711 INFO L93 Difference]: Finished difference Result 212667 states and 231695 transitions. [2021-11-20 06:47:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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 509 [2021-11-20 06:47:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:58,842 INFO L225 Difference]: With dead ends: 212667 [2021-11-20 06:47:58,842 INFO L226 Difference]: Without dead ends: 110371 [2021-11-20 06:47:58,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:47:58,878 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 791 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:58,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 383 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2829 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:47:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110371 states. [2021-11-20 06:48:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110371 to 106116. [2021-11-20 06:48:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106116 states, 106115 states have (on average 1.0807520143240823) internal successors, (114684), 106115 states have internal predecessors, (114684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106116 states to 106116 states and 114684 transitions. [2021-11-20 06:48:01,177 INFO L78 Accepts]: Start accepts. Automaton has 106116 states and 114684 transitions. Word has length 509 [2021-11-20 06:48:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:01,177 INFO L470 AbstractCegarLoop]: Abstraction has 106116 states and 114684 transitions. [2021-11-20 06:48:01,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 106116 states and 114684 transitions. [2021-11-20 06:48:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-11-20 06:48:01,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:01,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:01,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:48:01,196 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash -13785663, now seen corresponding path program 1 times [2021-11-20 06:48:01,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:01,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229668088] [2021-11-20 06:48:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:01,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 06:48:01,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229668088] [2021-11-20 06:48:01,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229668088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:01,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:48:01,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:48:01,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71612669] [2021-11-20 06:48:01,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:01,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:48:01,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:48:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:48:01,579 INFO L87 Difference]: Start difference. First operand 106116 states and 114684 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:03,595 INFO L93 Difference]: Finished difference Result 211804 states and 228938 transitions. [2021-11-20 06:48:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:48:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 529 [2021-11-20 06:48:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:03,717 INFO L225 Difference]: With dead ends: 211804 [2021-11-20 06:48:03,717 INFO L226 Difference]: Without dead ends: 106115 [2021-11-20 06:48:03,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:48:03,763 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 599 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:03,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 540 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:48:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106115 states. [2021-11-20 06:48:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106115 to 105688. [2021-11-20 06:48:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105688 states, 105687 states have (on average 1.0805207830669807) internal successors, (114197), 105687 states have internal predecessors, (114197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105688 states to 105688 states and 114197 transitions. [2021-11-20 06:48:05,710 INFO L78 Accepts]: Start accepts. Automaton has 105688 states and 114197 transitions. Word has length 529 [2021-11-20 06:48:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 105688 states and 114197 transitions. [2021-11-20 06:48:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 105688 states and 114197 transitions. [2021-11-20 06:48:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-20 06:48:05,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:05,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:05,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:48:05,726 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash -998465671, now seen corresponding path program 1 times [2021-11-20 06:48:05,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:05,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563562664] [2021-11-20 06:48:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:05,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 580 proven. 141 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:48:05,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563562664] [2021-11-20 06:48:05,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563562664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:48:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158394616] [2021-11-20 06:48:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:05,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:48:05,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:48:05,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:48:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:48:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 06:48:08,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:48:08,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158394616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:08,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:48:08,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 06:48:08,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593566378] [2021-11-20 06:48:08,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:08,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:48:08,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:48:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:48:08,065 INFO L87 Difference]: Start difference. First operand 105688 states and 114197 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:13,924 INFO L93 Difference]: Finished difference Result 217765 states and 234869 transitions. [2021-11-20 06:48:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:48:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 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 532 [2021-11-20 06:48:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:14,072 INFO L225 Difference]: With dead ends: 217765 [2021-11-20 06:48:14,072 INFO L226 Difference]: Without dead ends: 112504 [2021-11-20 06:48:14,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:48:14,128 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1249 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 183 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:48:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112504 states. [2021-11-20 06:48:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112504 to 106527. [2021-11-20 06:48:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106527 states, 106526 states have (on average 1.06740138557723) internal successors, (113706), 106526 states have internal predecessors, (113706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106527 states to 106527 states and 113706 transitions. [2021-11-20 06:48:16,139 INFO L78 Accepts]: Start accepts. Automaton has 106527 states and 113706 transitions. Word has length 532 [2021-11-20 06:48:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:16,140 INFO L470 AbstractCegarLoop]: Abstraction has 106527 states and 113706 transitions. [2021-11-20 06:48:16,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 106527 states and 113706 transitions. [2021-11-20 06:48:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-20 06:48:16,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:16,153 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:16,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:16,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b05f80-b6b6-4045-ab16-e678d690d935/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:48:16,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash -331083781, now seen corresponding path program 1 times [2021-11-20 06:48:16,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:48:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338862471] [2021-11-20 06:48:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:16,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:48:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 662 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:48:16,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:48:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338862471] [2021-11-20 06:48:16,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338862471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:16,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:48:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:48:16,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109191652] [2021-11-20 06:48:16,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:16,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:48:16,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:48:16,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:48:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:48:16,587 INFO L87 Difference]: Start difference. First operand 106527 states and 113706 transitions. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:48:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:20,347 INFO L93 Difference]: Finished difference Result 236096 states and 251776 transitions. [2021-11-20 06:48:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:48:20,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 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 532 [2021-11-20 06:48:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:20,520 INFO L225 Difference]: With dead ends: 236096 [2021-11-20 06:48:20,520 INFO L226 Difference]: Without dead ends: 129996 [2021-11-20 06:48:20,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:48:20,567 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 689 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:20,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 717 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:48:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129996 states. [2021-11-20 06:48:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129996 to 106529.