./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5e3e328fed8774c4d78dc98a52f4864ceaa6695a6eb383842cd1c614421b6ba --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:45:33,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:45:33,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:45:33,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:45:33,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:45:33,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:45:33,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:45:33,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:45:33,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:45:33,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:45:33,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:45:33,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:45:33,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:45:33,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:45:33,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:45:33,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:45:33,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:45:33,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:45:33,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:45:33,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:45:33,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:45:33,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:45:33,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:45:33,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:45:33,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:45:33,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:45:33,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:45:33,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:45:33,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:45:33,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:45:33,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:45:33,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:45:33,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:45:33,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:45:33,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:45:33,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:45:33,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:45:33,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:45:33,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:45:33,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:45:33,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:45:33,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:45:33,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:45:33,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:45:33,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:45:33,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:45:33,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:45:33,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:45:33,654 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:45:33,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:45:33,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:45:33,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:45:33,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:45:33,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:45:33,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:45:33,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:45:33,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:45:33,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:45:33,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:45:33,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:45:33,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:45:33,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:45:33,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:45:33,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:45:33,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:33,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:45:33,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:45:33,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:45:33,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:45:33,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:45:33,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:45:33,661 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:45:33,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:45:33,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:45:33,662 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_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5e3e328fed8774c4d78dc98a52f4864ceaa6695a6eb383842cd1c614421b6ba [2021-11-09 10:45:33,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:45:34,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:45:34,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:45:34,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:45:34,007 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:45:34,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 10:45:34,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/data/4eaa357dc/6a3da14049674e1d9ed9bb8261033a1d/FLAG676726804 [2021-11-09 10:45:35,061 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:45:35,062 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 10:45:35,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/data/4eaa357dc/6a3da14049674e1d9ed9bb8261033a1d/FLAG676726804 [2021-11-09 10:45:35,510 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/data/4eaa357dc/6a3da14049674e1d9ed9bb8261033a1d [2021-11-09 10:45:35,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:45:35,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:45:35,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:35,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:45:35,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:45:35,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:35" (1/1) ... [2021-11-09 10:45:35,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b065a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:35, skipping insertion in model container [2021-11-09 10:45:35,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:35" (1/1) ... [2021-11-09 10:45:35,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:45:35,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:45:36,027 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[8821,8834] [2021-11-09 10:45:36,086 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[15514,15527] [2021-11-09 10:45:36,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:36,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:45:37,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[8821,8834] [2021-11-09 10:45:37,075 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c[15514,15527] [2021-11-09 10:45:37,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:37,680 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:45:37,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37 WrapperNode [2021-11-09 10:45:37,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:37,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:45:37,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:45:37,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:45:37,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:37,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:45:38,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:45:38,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:45:38,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:45:38,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:45:38,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:45:38,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:45:38,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:45:38,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (1/1) ... [2021-11-09 10:45:38,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:38,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:45:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:45:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:45:38,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:45:38,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:45:38,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:45:43,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:45:43,808 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-09 10:45:43,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:43 BoogieIcfgContainer [2021-11-09 10:45:43,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:45:43,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:45:43,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:45:43,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:45:43,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:45:35" (1/3) ... [2021-11-09 10:45:43,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419692c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:43, skipping insertion in model container [2021-11-09 10:45:43,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:37" (2/3) ... [2021-11-09 10:45:43,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419692c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:43, skipping insertion in model container [2021-11-09 10:45:43,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:43" (3/3) ... [2021-11-09 10:45:43,823 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-09 10:45:43,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:45:43,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 10:45:43,903 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:45:43,913 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:45:43,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 10:45:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 894 states, 891 states have (on average 1.9023569023569022) internal successors, (1695), 893 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:45:43,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:43,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2021-11-09 10:45:43,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339341105] [2021-11-09 10:45:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:44,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:44,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339341105] [2021-11-09 10:45:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339341105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:44,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:44,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:45:44,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281543705] [2021-11-09 10:45:44,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:45:44,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:45:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:45:44,298 INFO L87 Difference]: Start difference. First operand has 894 states, 891 states have (on average 1.9023569023569022) internal successors, (1695), 893 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:44,394 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2021-11-09 10:45:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:45:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:45:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:44,415 INFO L225 Difference]: With dead ends: 1757 [2021-11-09 10:45:44,415 INFO L226 Difference]: Without dead ends: 828 [2021-11-09 10:45:44,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:45:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-09 10:45:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2021-11-09 10:45:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.8910411622276029) internal successors, (1562), 827 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2021-11-09 10:45:44,531 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2021-11-09 10:45:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:44,532 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2021-11-09 10:45:44,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2021-11-09 10:45:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:45:44,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:44,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:44,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:45:44,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-11-09 10:45:44,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:44,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978797641] [2021-11-09 10:45:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:44,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:44,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:44,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978797641] [2021-11-09 10:45:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978797641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:44,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:44,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:45:44,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142112036] [2021-11-09 10:45:44,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:45:44,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:45:44,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:44,680 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:44,796 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2021-11-09 10:45:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:45:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:45:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:44,803 INFO L225 Difference]: With dead ends: 877 [2021-11-09 10:45:44,803 INFO L226 Difference]: Without dead ends: 828 [2021-11-09 10:45:44,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:45:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-09 10:45:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2021-11-09 10:45:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.8631961259079903) internal successors, (1539), 827 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2021-11-09 10:45:44,831 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2021-11-09 10:45:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:44,831 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2021-11-09 10:45:44,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2021-11-09 10:45:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:45:44,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:44,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:44,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:45:44,836 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-11-09 10:45:44,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:44,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419251738] [2021-11-09 10:45:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:44,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:44,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:44,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419251738] [2021-11-09 10:45:44,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419251738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:44,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:44,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:44,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431813734] [2021-11-09 10:45:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:44,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:44,971 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:45,178 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2021-11-09 10:45:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:45:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:45:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:45,187 INFO L225 Difference]: With dead ends: 1188 [2021-11-09 10:45:45,188 INFO L226 Difference]: Without dead ends: 1143 [2021-11-09 10:45:45,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:45:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-11-09 10:45:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2021-11-09 10:45:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 869 states have (on average 1.8492520138089759) internal successors, (1607), 870 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2021-11-09 10:45:45,225 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2021-11-09 10:45:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:45,225 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2021-11-09 10:45:45,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2021-11-09 10:45:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:45:45,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:45,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:45,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:45:45,229 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-11-09 10:45:45,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:45,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509237195] [2021-11-09 10:45:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:45,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:45,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509237195] [2021-11-09 10:45:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509237195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:45,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:45,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131054562] [2021-11-09 10:45:45,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:45,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:45,380 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:45,429 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2021-11-09 10:45:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:45:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:45,437 INFO L225 Difference]: With dead ends: 1036 [2021-11-09 10:45:45,437 INFO L226 Difference]: Without dead ends: 948 [2021-11-09 10:45:45,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-09 10:45:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2021-11-09 10:45:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 942 states have (on average 1.8248407643312101) internal successors, (1719), 943 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2021-11-09 10:45:45,473 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2021-11-09 10:45:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:45,474 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2021-11-09 10:45:45,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2021-11-09 10:45:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:45:45,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:45,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:45,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:45:45,477 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:45,477 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-11-09 10:45:45,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:45,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752884710] [2021-11-09 10:45:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:45,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:45,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752884710] [2021-11-09 10:45:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752884710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:45,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577466792] [2021-11-09 10:45:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:45,646 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:45,803 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2021-11-09 10:45:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:45:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:45,810 INFO L225 Difference]: With dead ends: 1107 [2021-11-09 10:45:45,811 INFO L226 Difference]: Without dead ends: 946 [2021-11-09 10:45:45,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:45:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-11-09 10:45:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2021-11-09 10:45:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 942 states have (on average 1.8227176220806793) internal successors, (1717), 943 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2021-11-09 10:45:45,842 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2021-11-09 10:45:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:45,842 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2021-11-09 10:45:45,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2021-11-09 10:45:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:45:45,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:45,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:45,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:45:45,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-11-09 10:45:45,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:45,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987739250] [2021-11-09 10:45:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:45,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:45,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:45,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987739250] [2021-11-09 10:45:45,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987739250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:45,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:45,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:45,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990396088] [2021-11-09 10:45:45,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:45,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:45,896 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:45,935 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2021-11-09 10:45:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:45:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:45,943 INFO L225 Difference]: With dead ends: 1242 [2021-11-09 10:45:45,943 INFO L226 Difference]: Without dead ends: 1081 [2021-11-09 10:45:45,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-09 10:45:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2021-11-09 10:45:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1077 states have (on average 1.7836583101207057) internal successors, (1921), 1078 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2021-11-09 10:45:45,980 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2021-11-09 10:45:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:45,980 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2021-11-09 10:45:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2021-11-09 10:45:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:45:45,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:45,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:45:45,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-11-09 10:45:45,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:45,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348212387] [2021-11-09 10:45:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:45,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:46,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348212387] [2021-11-09 10:45:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348212387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:46,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102063365] [2021-11-09 10:45:46,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,027 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,076 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2021-11-09 10:45:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:45:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,122 INFO L225 Difference]: With dead ends: 1623 [2021-11-09 10:45:46,122 INFO L226 Difference]: Without dead ends: 1327 [2021-11-09 10:45:46,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-11-09 10:45:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2021-11-09 10:45:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1323 states have (on average 1.72713529856387) internal successors, (2285), 1324 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2021-11-09 10:45:46,169 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2021-11-09 10:45:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:46,170 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2021-11-09 10:45:46,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2021-11-09 10:45:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:45:46,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:46,171 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:45:46,171 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-11-09 10:45:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679162454] [2021-11-09 10:45:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:46,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679162454] [2021-11-09 10:45:46,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679162454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:46,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:46,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:46,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410413965] [2021-11-09 10:45:46,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:46,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,212 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,276 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2021-11-09 10:45:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:45:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,287 INFO L225 Difference]: With dead ends: 2313 [2021-11-09 10:45:46,288 INFO L226 Difference]: Without dead ends: 1771 [2021-11-09 10:45:46,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-09 10:45:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-11-09 10:45:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6553480475382003) internal successors, (2925), 1768 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2021-11-09 10:45:46,362 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2021-11-09 10:45:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2021-11-09 10:45:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2021-11-09 10:45:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:45:46,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:46,364 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:46,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:45:46,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-11-09 10:45:46,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829258290] [2021-11-09 10:45:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:46,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829258290] [2021-11-09 10:45:46,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829258290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:46,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:46,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:45:46,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84695846] [2021-11-09 10:45:46,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:45:46,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:45:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:45:46,460 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,693 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2021-11-09 10:45:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:45:46,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 10:45:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,709 INFO L225 Difference]: With dead ends: 2523 [2021-11-09 10:45:46,709 INFO L226 Difference]: Without dead ends: 2521 [2021-11-09 10:45:46,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:45:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-11-09 10:45:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2021-11-09 10:45:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1817 states, 1815 states have (on average 1.6336088154269972) internal successors, (2965), 1816 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2021-11-09 10:45:46,812 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2021-11-09 10:45:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:46,812 INFO L470 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2021-11-09 10:45:46,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2021-11-09 10:45:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:45:46,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:46,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:46,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:45:46,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-11-09 10:45:46,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067370158] [2021-11-09 10:45:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:46,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067370158] [2021-11-09 10:45:46,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067370158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:46,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:46,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:46,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23775093] [2021-11-09 10:45:46,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:46,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,853 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,965 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2021-11-09 10:45:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:46,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-09 10:45:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,978 INFO L225 Difference]: With dead ends: 2880 [2021-11-09 10:45:46,979 INFO L226 Difference]: Without dead ends: 2285 [2021-11-09 10:45:46,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-11-09 10:45:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2021-11-09 10:45:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5883384480491012) internal successors, (3623), 2282 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2021-11-09 10:45:47,110 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2021-11-09 10:45:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:47,110 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2021-11-09 10:45:47,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2021-11-09 10:45:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 10:45:47,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:47,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:47,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:45:47,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -772730747, now seen corresponding path program 1 times [2021-11-09 10:45:47,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:47,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131181534] [2021-11-09 10:45:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:47,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:47,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:47,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131181534] [2021-11-09 10:45:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131181534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:47,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:47,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:47,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146109071] [2021-11-09 10:45:47,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:47,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:47,179 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:54,524 INFO L93 Difference]: Finished difference Result 4538 states and 7932 transitions. [2021-11-09 10:45:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 10:45:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:54,547 INFO L225 Difference]: With dead ends: 4538 [2021-11-09 10:45:54,547 INFO L226 Difference]: Without dead ends: 3785 [2021-11-09 10:45:54,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-11-09 10:45:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2021-11-09 10:45:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3783 states have (on average 1.5165212794078773) internal successors, (5737), 3784 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2021-11-09 10:45:54,715 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 60 [2021-11-09 10:45:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:54,715 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2021-11-09 10:45:54,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2021-11-09 10:45:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:45:54,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:54,718 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:45:54,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:45:54,718 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2021-11-09 10:45:54,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:54,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221441885] [2021-11-09 10:45:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:54,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 10:45:54,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:54,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221441885] [2021-11-09 10:45:54,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221441885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:54,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:54,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:54,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934963392] [2021-11-09 10:45:54,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:54,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:54,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:54,794 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:55,283 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2021-11-09 10:45:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:55,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 10:45:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:55,333 INFO L225 Difference]: With dead ends: 10091 [2021-11-09 10:45:55,333 INFO L226 Difference]: Without dead ends: 8593 [2021-11-09 10:45:55,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:45:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2021-11-09 10:45:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2021-11-09 10:45:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.4898655048304603) internal successors, (7865), 5280 states have internal predecessors, (7865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2021-11-09 10:45:55,733 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2021-11-09 10:45:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:55,733 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2021-11-09 10:45:55,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2021-11-09 10:45:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:45:55,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:55,736 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:45:55,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:45:55,737 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2021-11-09 10:45:55,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:55,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806765850] [2021-11-09 10:45:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:55,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:45:55,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:55,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806765850] [2021-11-09 10:45:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806765850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:55,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:55,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:55,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765931322] [2021-11-09 10:45:55,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:55,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:55,822 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:56,485 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2021-11-09 10:45:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 10:45:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:56,524 INFO L225 Difference]: With dead ends: 11587 [2021-11-09 10:45:56,525 INFO L226 Difference]: Without dead ends: 10089 [2021-11-09 10:45:56,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:45:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2021-11-09 10:45:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2021-11-09 10:45:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7527 states have (on average 1.4663212435233162) internal successors, (11037), 7528 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2021-11-09 10:45:57,049 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2021-11-09 10:45:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:57,050 INFO L470 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2021-11-09 10:45:57,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2021-11-09 10:45:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:45:57,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:57,053 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:45:57,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:45:57,053 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2021-11-09 10:45:57,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:57,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266845596] [2021-11-09 10:45:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:57,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:45:57,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266845596] [2021-11-09 10:45:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266845596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:57,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:57,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726353282] [2021-11-09 10:45:57,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:57,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:57,154 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:57,792 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2021-11-09 10:45:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 10:45:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:57,817 INFO L225 Difference]: With dead ends: 13083 [2021-11-09 10:45:57,818 INFO L226 Difference]: Without dead ends: 11585 [2021-11-09 10:45:57,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:45:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2021-11-09 10:45:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2021-11-09 10:45:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9023 states have (on average 1.459049096752743) internal successors, (13165), 9024 states have internal predecessors, (13165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2021-11-09 10:45:58,415 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2021-11-09 10:45:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:58,415 INFO L470 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2021-11-09 10:45:58,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2021-11-09 10:45:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:45:58,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:58,419 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:45:58,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:45:58,419 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2021-11-09 10:45:58,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:58,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716514884] [2021-11-09 10:45:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:58,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:58,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:58,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716514884] [2021-11-09 10:45:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716514884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:58,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746198010] [2021-11-09 10:45:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:58,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:58,471 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:58,749 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2021-11-09 10:45:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:45:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:58,765 INFO L225 Difference]: With dead ends: 13806 [2021-11-09 10:45:58,766 INFO L226 Difference]: Without dead ends: 7068 [2021-11-09 10:45:58,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2021-11-09 10:45:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2021-11-09 10:45:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7066 states, 7064 states have (on average 1.469705549263873) internal successors, (10382), 7065 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2021-11-09 10:45:59,194 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2021-11-09 10:45:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:59,195 INFO L470 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2021-11-09 10:45:59,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2021-11-09 10:45:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:45:59,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:59,198 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:45:59,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:45:59,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2021-11-09 10:45:59,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:59,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864465199] [2021-11-09 10:45:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:59,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:45:59,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:59,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864465199] [2021-11-09 10:45:59,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864465199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:59,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:45:59,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029624410] [2021-11-09 10:45:59,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:45:59,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:45:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:45:59,281 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:59,760 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2021-11-09 10:45:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:45:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:59,781 INFO L225 Difference]: With dead ends: 11300 [2021-11-09 10:45:59,782 INFO L226 Difference]: Without dead ends: 10242 [2021-11-09 10:45:59,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:45:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2021-11-09 10:46:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2021-11-09 10:46:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8122 states, 8120 states have (on average 1.4637931034482758) internal successors, (11886), 8121 states have internal predecessors, (11886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2021-11-09 10:46:00,364 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2021-11-09 10:46:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:00,364 INFO L470 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2021-11-09 10:46:00,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2021-11-09 10:46:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:46:00,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:00,369 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:00,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:46:00,370 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2021-11-09 10:46:00,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:00,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697311084] [2021-11-09 10:46:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:00,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:00,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697311084] [2021-11-09 10:46:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697311084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:00,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:00,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671259400] [2021-11-09 10:46:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:00,451 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:00,740 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2021-11-09 10:46:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-09 10:46:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:00,753 INFO L225 Difference]: With dead ends: 11030 [2021-11-09 10:46:00,754 INFO L226 Difference]: Without dead ends: 5220 [2021-11-09 10:46:00,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-11-09 10:46:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2021-11-09 10:46:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5216 states have (on average 1.477377300613497) internal successors, (7706), 5217 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2021-11-09 10:46:01,053 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2021-11-09 10:46:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,054 INFO L470 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2021-11-09 10:46:01,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2021-11-09 10:46:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:46:01,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,056 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:01,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:46:01,056 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2021-11-09 10:46:01,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620755463] [2021-11-09 10:46:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:01,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620755463] [2021-11-09 10:46:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620755463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:01,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:01,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:01,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806271193] [2021-11-09 10:46:01,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:01,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:01,107 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:01,240 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2021-11-09 10:46:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-09 10:46:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:01,251 INFO L225 Difference]: With dead ends: 6674 [2021-11-09 10:46:01,251 INFO L226 Difference]: Without dead ends: 3768 [2021-11-09 10:46:01,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-11-09 10:46:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2021-11-09 10:46:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3766 states, 3764 states have (on average 1.497874601487779) internal successors, (5638), 3765 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2021-11-09 10:46:01,465 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2021-11-09 10:46:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,465 INFO L470 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2021-11-09 10:46:01,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2021-11-09 10:46:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:46:01,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,467 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:46:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:46:01,468 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2021-11-09 10:46:01,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95500590] [2021-11-09 10:46:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:01,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95500590] [2021-11-09 10:46:01,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95500590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:01,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:01,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:01,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371636401] [2021-11-09 10:46:01,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:01,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:01,517 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:01,597 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2021-11-09 10:46:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-09 10:46:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:01,605 INFO L225 Difference]: With dead ends: 4496 [2021-11-09 10:46:01,605 INFO L226 Difference]: Without dead ends: 3042 [2021-11-09 10:46:01,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-11-09 10:46:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2021-11-09 10:46:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3038 states have (on average 1.5190915075707703) internal successors, (4615), 3039 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2021-11-09 10:46:01,697 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2021-11-09 10:46:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2021-11-09 10:46:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2021-11-09 10:46:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:46:01,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,700 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:01,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:46:01,700 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2021-11-09 10:46:01,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854151955] [2021-11-09 10:46:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:01,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854151955] [2021-11-09 10:46:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854151955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:01,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647940720] [2021-11-09 10:46:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:01,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:01,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:01,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:46:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:46:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:46:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647940720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:02,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:02,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-09 10:46:02,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865261436] [2021-11-09 10:46:02,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:46:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:46:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:46:02,655 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 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) [2021-11-09 10:46:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:04,297 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2021-11-09 10:46:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:46:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 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 81 [2021-11-09 10:46:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:04,309 INFO L225 Difference]: With dead ends: 6473 [2021-11-09 10:46:04,309 INFO L226 Difference]: Without dead ends: 5745 [2021-11-09 10:46:04,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:46:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-11-09 10:46:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2021-11-09 10:46:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4832 states, 4830 states have (on average 1.429399585921325) internal successors, (6904), 4831 states have internal predecessors, (6904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2021-11-09 10:46:04,678 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2021-11-09 10:46:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:04,679 INFO L470 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2021-11-09 10:46:04,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 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) [2021-11-09 10:46:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2021-11-09 10:46:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:46:04,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:04,681 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:04,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:04,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:04,909 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2021-11-09 10:46:04,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:04,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333843384] [2021-11-09 10:46:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:04,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:05,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:05,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333843384] [2021-11-09 10:46:05,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333843384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:05,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524254246] [2021-11-09 10:46:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:05,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:05,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:05,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:05,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:46:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:46:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524254246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:06,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:06,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 10:46:06,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251153824] [2021-11-09 10:46:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:46:06,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:46:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:46:06,554 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:12,311 INFO L93 Difference]: Finished difference Result 31208 states and 40988 transitions. [2021-11-09 10:46:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 10:46:12,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 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 82 [2021-11-09 10:46:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:12,365 INFO L225 Difference]: With dead ends: 31208 [2021-11-09 10:46:12,365 INFO L226 Difference]: Without dead ends: 28813 [2021-11-09 10:46:12,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1106, Invalid=4900, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:46:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28813 states. [2021-11-09 10:46:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28813 to 19589. [2021-11-09 10:46:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19589 states, 19587 states have (on average 1.3211824169091744) internal successors, (25878), 19588 states have internal predecessors, (25878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19589 states to 19589 states and 25878 transitions. [2021-11-09 10:46:14,054 INFO L78 Accepts]: Start accepts. Automaton has 19589 states and 25878 transitions. Word has length 82 [2021-11-09 10:46:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:14,054 INFO L470 AbstractCegarLoop]: Abstraction has 19589 states and 25878 transitions. [2021-11-09 10:46:14,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19589 states and 25878 transitions. [2021-11-09 10:46:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:46:14,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:14,058 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:14,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:14,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:14,266 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash -5656413, now seen corresponding path program 1 times [2021-11-09 10:46:14,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:14,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369907352] [2021-11-09 10:46:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:14,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:46:14,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:14,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369907352] [2021-11-09 10:46:14,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369907352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:14,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:14,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:14,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016457994] [2021-11-09 10:46:14,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:14,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:14,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:14,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:14,333 INFO L87 Difference]: Start difference. First operand 19589 states and 25878 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:15,814 INFO L93 Difference]: Finished difference Result 33963 states and 44551 transitions. [2021-11-09 10:46:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 82 [2021-11-09 10:46:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:15,841 INFO L225 Difference]: With dead ends: 33963 [2021-11-09 10:46:15,842 INFO L226 Difference]: Without dead ends: 16746 [2021-11-09 10:46:15,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16746 states. [2021-11-09 10:46:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16746 to 16746. [2021-11-09 10:46:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16746 states, 16744 states have (on average 1.3135451505016722) internal successors, (21994), 16745 states have internal predecessors, (21994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 21994 transitions. [2021-11-09 10:46:17,409 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 21994 transitions. Word has length 82 [2021-11-09 10:46:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:17,410 INFO L470 AbstractCegarLoop]: Abstraction has 16746 states and 21994 transitions. [2021-11-09 10:46:17,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 21994 transitions. [2021-11-09 10:46:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:46:17,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:17,413 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:17,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 10:46:17,414 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1482936829, now seen corresponding path program 1 times [2021-11-09 10:46:17,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:17,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977899817] [2021-11-09 10:46:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:17,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 10:46:17,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:17,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977899817] [2021-11-09 10:46:17,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977899817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:17,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:17,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:17,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37393099] [2021-11-09 10:46:17,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:17,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:17,484 INFO L87 Difference]: Start difference. First operand 16746 states and 21994 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:18,738 INFO L93 Difference]: Finished difference Result 27357 states and 35544 transitions. [2021-11-09 10:46:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 82 [2021-11-09 10:46:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:18,759 INFO L225 Difference]: With dead ends: 27357 [2021-11-09 10:46:18,760 INFO L226 Difference]: Without dead ends: 13095 [2021-11-09 10:46:18,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-11-09 10:46:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 13095. [2021-11-09 10:46:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13095 states, 13093 states have (on average 1.3088673336897578) internal successors, (17137), 13094 states have internal predecessors, (17137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13095 states to 13095 states and 17137 transitions. [2021-11-09 10:46:19,727 INFO L78 Accepts]: Start accepts. Automaton has 13095 states and 17137 transitions. Word has length 82 [2021-11-09 10:46:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:19,727 INFO L470 AbstractCegarLoop]: Abstraction has 13095 states and 17137 transitions. [2021-11-09 10:46:19,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13095 states and 17137 transitions. [2021-11-09 10:46:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:46:19,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:19,729 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:19,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 10:46:19,729 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1965972195, now seen corresponding path program 1 times [2021-11-09 10:46:19,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:19,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103574839] [2021-11-09 10:46:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:46:19,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:19,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103574839] [2021-11-09 10:46:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103574839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:19,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:19,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:19,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910064498] [2021-11-09 10:46:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:19,791 INFO L87 Difference]: Start difference. First operand 13095 states and 17137 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:20,729 INFO L93 Difference]: Finished difference Result 21402 states and 27623 transitions. [2021-11-09 10:46:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 10:46:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:20,743 INFO L225 Difference]: With dead ends: 21402 [2021-11-09 10:46:20,744 INFO L226 Difference]: Without dead ends: 10659 [2021-11-09 10:46:20,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10659 states. [2021-11-09 10:46:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10659 to 10659. [2021-11-09 10:46:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10657 states have (on average 1.3131275218166463) internal successors, (13994), 10658 states have internal predecessors, (13994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 13994 transitions. [2021-11-09 10:46:21,606 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 13994 transitions. Word has length 82 [2021-11-09 10:46:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:21,606 INFO L470 AbstractCegarLoop]: Abstraction has 10659 states and 13994 transitions. [2021-11-09 10:46:21,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 13994 transitions. [2021-11-09 10:46:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:46:21,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:21,608 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:21,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 10:46:21,608 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1473979490, now seen corresponding path program 1 times [2021-11-09 10:46:21,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:21,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430010118] [2021-11-09 10:46:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:21,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:21,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:21,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430010118] [2021-11-09 10:46:21,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430010118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:21,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851475935] [2021-11-09 10:46:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:21,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:21,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:21,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:46:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:46:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:23,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851475935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:23,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:23,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-11-09 10:46:23,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992062300] [2021-11-09 10:46:23,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:46:23,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:46:23,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:46:23,465 INFO L87 Difference]: Start difference. First operand 10659 states and 13994 transitions. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 18 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) [2021-11-09 10:46:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:28,228 INFO L93 Difference]: Finished difference Result 29501 states and 37845 transitions. [2021-11-09 10:46:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:46:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 18 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 83 [2021-11-09 10:46:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:28,249 INFO L225 Difference]: With dead ends: 29501 [2021-11-09 10:46:28,249 INFO L226 Difference]: Without dead ends: 22432 [2021-11-09 10:46:28,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=846, Invalid=2576, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:46:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22432 states. [2021-11-09 10:46:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22432 to 14938. [2021-11-09 10:46:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14938 states, 14936 states have (on average 1.2850830208891268) internal successors, (19194), 14937 states have internal predecessors, (19194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14938 states to 14938 states and 19194 transitions. [2021-11-09 10:46:29,797 INFO L78 Accepts]: Start accepts. Automaton has 14938 states and 19194 transitions. Word has length 83 [2021-11-09 10:46:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:29,797 INFO L470 AbstractCegarLoop]: Abstraction has 14938 states and 19194 transitions. [2021-11-09 10:46:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 18 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) [2021-11-09 10:46:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 14938 states and 19194 transitions. [2021-11-09 10:46:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:46:29,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:29,800 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:29,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 10:46:30,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:46:30,025 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 792401696, now seen corresponding path program 1 times [2021-11-09 10:46:30,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:30,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984651786] [2021-11-09 10:46:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:30,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:46:30,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:30,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984651786] [2021-11-09 10:46:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984651786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:30,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:30,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:30,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448518710] [2021-11-09 10:46:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:30,087 INFO L87 Difference]: Start difference. First operand 14938 states and 19194 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:32,268 INFO L93 Difference]: Finished difference Result 35499 states and 45043 transitions. [2021-11-09 10:46:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 10:46:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:32,290 INFO L225 Difference]: With dead ends: 35499 [2021-11-09 10:46:32,290 INFO L226 Difference]: Without dead ends: 22885 [2021-11-09 10:46:32,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22885 states. [2021-11-09 10:46:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22885 to 20771. [2021-11-09 10:46:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20771 states, 20769 states have (on average 1.2742548991285088) internal successors, (26465), 20770 states have internal predecessors, (26465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20771 states to 20771 states and 26465 transitions. [2021-11-09 10:46:34,315 INFO L78 Accepts]: Start accepts. Automaton has 20771 states and 26465 transitions. Word has length 83 [2021-11-09 10:46:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 20771 states and 26465 transitions. [2021-11-09 10:46:34,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20771 states and 26465 transitions. [2021-11-09 10:46:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 10:46:34,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:34,318 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:34,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 10:46:34,318 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2021-11-09 10:46:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:34,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548786760] [2021-11-09 10:46:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:34,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548786760] [2021-11-09 10:46:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548786760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778531910] [2021-11-09 10:46:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:34,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:34,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:46:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:35,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:46:35,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:41,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778531910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:41,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:41,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 26] total 38 [2021-11-09 10:46:41,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546414908] [2021-11-09 10:46:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 10:46:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 10:46:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:46:41,225 INFO L87 Difference]: Start difference. First operand 20771 states and 26465 transitions. Second operand has 38 states, 38 states have (on average 4.184210526315789) internal successors, (159), 38 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:58,036 INFO L93 Difference]: Finished difference Result 42387 states and 53293 transitions. [2021-11-09 10:46:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-09 10:46:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.184210526315789) internal successors, (159), 38 states have internal predecessors, (159), 0 states have call successors, (0), 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 84 [2021-11-09 10:46:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:58,073 INFO L225 Difference]: With dead ends: 42387 [2021-11-09 10:46:58,073 INFO L226 Difference]: Without dead ends: 35595 [2021-11-09 10:46:58,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3002, Invalid=17020, Unknown=0, NotChecked=0, Total=20022 [2021-11-09 10:46:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35595 states. [2021-11-09 10:47:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35595 to 18942. [2021-11-09 10:47:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18942 states, 18940 states have (on average 1.279039070749736) internal successors, (24225), 18941 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18942 states to 18942 states and 24225 transitions. [2021-11-09 10:47:00,092 INFO L78 Accepts]: Start accepts. Automaton has 18942 states and 24225 transitions. Word has length 84 [2021-11-09 10:47:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:00,093 INFO L470 AbstractCegarLoop]: Abstraction has 18942 states and 24225 transitions. [2021-11-09 10:47:00,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.184210526315789) internal successors, (159), 38 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18942 states and 24225 transitions. [2021-11-09 10:47:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 10:47:00,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:00,095 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:00,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:00,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:47:00,297 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash -537667582, now seen corresponding path program 1 times [2021-11-09 10:47:00,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:00,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461364286] [2021-11-09 10:47:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:00,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:00,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461364286] [2021-11-09 10:47:00,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461364286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675634173] [2021-11-09 10:47:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:00,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:00,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:47:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 10:47:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:07,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675634173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:07,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:07,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 37 [2021-11-09 10:48:07,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933923764] [2021-11-09 10:48:07,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:48:07,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:48:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:48:07,911 INFO L87 Difference]: Start difference. First operand 18942 states and 24225 transitions. Second operand has 37 states, 37 states have (on average 4.0) internal successors, (148), 37 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:18,224 INFO L93 Difference]: Finished difference Result 40768 states and 52451 transitions. [2021-11-09 10:48:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 10:48:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.0) internal successors, (148), 37 states have internal predecessors, (148), 0 states have call successors, (0), 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 84 [2021-11-09 10:48:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:18,256 INFO L225 Difference]: With dead ends: 40768 [2021-11-09 10:48:18,256 INFO L226 Difference]: Without dead ends: 33964 [2021-11-09 10:48:18,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1257, Invalid=6225, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 10:48:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33964 states. [2021-11-09 10:48:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33964 to 18100. [2021-11-09 10:48:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18100 states, 18098 states have (on average 1.2889269532545033) internal successors, (23327), 18099 states have internal predecessors, (23327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18100 states to 18100 states and 23327 transitions. [2021-11-09 10:48:20,524 INFO L78 Accepts]: Start accepts. Automaton has 18100 states and 23327 transitions. Word has length 84 [2021-11-09 10:48:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:20,524 INFO L470 AbstractCegarLoop]: Abstraction has 18100 states and 23327 transitions. [2021-11-09 10:48:20,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.0) internal successors, (148), 37 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18100 states and 23327 transitions. [2021-11-09 10:48:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 10:48:20,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:20,526 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:20,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:20,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:48:20,753 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1176318431, now seen corresponding path program 1 times [2021-11-09 10:48:20,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:20,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142859169] [2021-11-09 10:48:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:20,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:21,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:21,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142859169] [2021-11-09 10:48:21,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142859169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:21,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116373071] [2021-11-09 10:48:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:21,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:21,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:48:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:48:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116373071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:24,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 10:48:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796571800] [2021-11-09 10:48:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:48:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:48:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:48:24,360 INFO L87 Difference]: Start difference. First operand 18100 states and 23327 transitions. Second operand has 22 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:33,932 INFO L93 Difference]: Finished difference Result 27236 states and 35033 transitions. [2021-11-09 10:48:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 10:48:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 0 states have call successors, (0), 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 84 [2021-11-09 10:48:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:33,947 INFO L225 Difference]: With dead ends: 27236 [2021-11-09 10:48:33,947 INFO L226 Difference]: Without dead ends: 16608 [2021-11-09 10:48:33,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1206, Invalid=6804, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 10:48:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16608 states. [2021-11-09 10:48:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16608 to 10858. [2021-11-09 10:48:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10858 states, 10856 states have (on average 1.3334561532792926) internal successors, (14476), 10857 states have internal predecessors, (14476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 14476 transitions. [2021-11-09 10:48:35,306 INFO L78 Accepts]: Start accepts. Automaton has 10858 states and 14476 transitions. Word has length 84 [2021-11-09 10:48:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:35,306 INFO L470 AbstractCegarLoop]: Abstraction has 10858 states and 14476 transitions. [2021-11-09 10:48:35,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10858 states and 14476 transitions. [2021-11-09 10:48:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 10:48:35,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:35,310 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:48:35,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:35,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:48:35,525 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 747658027, now seen corresponding path program 1 times [2021-11-09 10:48:35,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:35,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069138975] [2021-11-09 10:48:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:35,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:35,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:35,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069138975] [2021-11-09 10:48:35,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069138975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:35,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:35,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:35,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302641975] [2021-11-09 10:48:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:35,652 INFO L87 Difference]: Start difference. First operand 10858 states and 14476 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:40,803 INFO L93 Difference]: Finished difference Result 14652 states and 20839 transitions. [2021-11-09 10:48:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-09 10:48:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:40,813 INFO L225 Difference]: With dead ends: 14652 [2021-11-09 10:48:40,814 INFO L226 Difference]: Without dead ends: 12360 [2021-11-09 10:48:40,817 INFO L786 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 [2021-11-09 10:48:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12360 states. [2021-11-09 10:48:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12360 to 11609. [2021-11-09 10:48:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11609 states, 11607 states have (on average 1.3120530714224174) internal successors, (15229), 11608 states have internal predecessors, (15229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11609 states to 11609 states and 15229 transitions. [2021-11-09 10:48:42,114 INFO L78 Accepts]: Start accepts. Automaton has 11609 states and 15229 transitions. Word has length 131 [2021-11-09 10:48:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:42,114 INFO L470 AbstractCegarLoop]: Abstraction has 11609 states and 15229 transitions. [2021-11-09 10:48:42,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 11609 states and 15229 transitions. [2021-11-09 10:48:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 10:48:42,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:42,119 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:42,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 10:48:42,120 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2021-11-09 10:48:42,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:42,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497166629] [2021-11-09 10:48:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 38 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:42,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:42,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497166629] [2021-11-09 10:48:42,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497166629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:42,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293886833] [2021-11-09 10:48:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:42,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:42,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_164a6a54-7ac8-4b55-96ba-8c8543c3cad7/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:48:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:48:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293886833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:59,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:59,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-09 10:48:59,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454267927] [2021-11-09 10:48:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:48:59,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:48:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=379, Unknown=6, NotChecked=0, Total=462 [2021-11-09 10:48:59,703 INFO L87 Difference]: Start difference. First operand 11609 states and 15229 transitions. Second operand has 22 states, 22 states have (on average 11.454545454545455) internal successors, (252), 21 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)