./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bdf357eff96525f897a0fa54e5d16275a68a1cc63236862522df0c356d03bb1d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:27:15,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:15,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:15,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:15,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:15,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:15,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:15,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:15,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:15,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:15,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:15,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:15,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:15,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:15,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:15,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:15,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:15,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:15,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:15,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:15,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:15,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:15,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:15,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:15,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:15,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:15,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:15,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:15,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:15,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:15,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:15,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:15,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:15,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:15,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:15,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:15,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:15,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:15,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:15,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:15,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:15,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:27:15,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:15,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:15,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:15,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:15,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:15,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:15,609 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:15,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:15,609 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:15,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:15,610 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:15,610 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:15,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:15,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:15,610 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:15,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:15,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:15,611 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:15,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:15,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:15,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:15,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:15,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:15,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:15,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:15,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:15,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:15,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:15,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:15,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:15,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:15,615 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:15,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:15,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:15,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:15,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:15,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:15,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:15,616 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_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdf357eff96525f897a0fa54e5d16275a68a1cc63236862522df0c356d03bb1d [2022-11-03 03:27:15,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:15,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:15,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:15,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:15,927 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:15,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:15,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/f747f741f/0b1c8922cdf7455cbadb4f3bca5889a1/FLAG96a28d50a [2022-11-03 03:27:16,516 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:16,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:16,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/f747f741f/0b1c8922cdf7455cbadb4f3bca5889a1/FLAG96a28d50a [2022-11-03 03:27:16,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/f747f741f/0b1c8922cdf7455cbadb4f3bca5889a1 [2022-11-03 03:27:16,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:16,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:16,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:16,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:16,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:16,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:16" (1/1) ... [2022-11-03 03:27:16,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65265fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:16, skipping insertion in model container [2022-11-03 03:27:16,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:16" (1/1) ... [2022-11-03 03:27:16,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:16,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:17,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c[1107,1120] [2022-11-03 03:27:17,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:17,378 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:17,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c[1107,1120] [2022-11-03 03:27:17,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:17,553 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:17,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17 WrapperNode [2022-11-03 03:27:17,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:17,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:17,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:17,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:17,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,699 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1395 [2022-11-03 03:27:17,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:17,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:17,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:17,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:17,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,851 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:17,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:17,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:17,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:17,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (1/1) ... [2022-11-03 03:27:17,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:17,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:17,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:18,288 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:18,290 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:19,841 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:24,594 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:24,594 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:27:24,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:24 BoogieIcfgContainer [2022-11-03 03:27:24,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:24,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:24,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:24,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:24,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:16" (1/3) ... [2022-11-03 03:27:24,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71945c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:24, skipping insertion in model container [2022-11-03 03:27:24,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:17" (2/3) ... [2022-11-03 03:27:24,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71945c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:24, skipping insertion in model container [2022-11-03 03:27:24,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:24" (3/3) ... [2022-11-03 03:27:24,607 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:24,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:24,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:24,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:24,682 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b1babd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:24,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:27:24,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:24,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:27:24,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 21457337, now seen corresponding path program 1 times [2022-11-03 03:27:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:24,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970264152] [2022-11-03 03:27:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:24,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:27:25,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:27:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:27:25,202 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:27:25,205 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:27:25,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:27:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:27:25,214 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:27:25,218 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:27:25,239 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:27:25,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:27:25 BoogieIcfgContainer [2022-11-03 03:27:25,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:27:25,251 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:27:25,251 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:27:25,251 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:27:25,252 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:24" (3/4) ... [2022-11-03 03:27:25,255 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:27:25,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:27:25,256 INFO L158 Benchmark]: Toolchain (without parser) took 8431.63ms. Allocated memory was 127.9MB in the beginning and 658.5MB in the end (delta: 530.6MB). Free memory was 89.7MB in the beginning and 264.1MB in the end (delta: -174.3MB). Peak memory consumption was 356.0MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,257 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 127.9MB. Free memory is still 107.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:27:25,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 722.98ms. Allocated memory is still 127.9MB. Free memory was 89.6MB in the beginning and 77.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,258 INFO L158 Benchmark]: Boogie Procedure Inliner took 145.08ms. Allocated memory is still 127.9MB. Free memory was 77.1MB in the beginning and 60.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,263 INFO L158 Benchmark]: Boogie Preprocessor took 186.34ms. Allocated memory is still 127.9MB. Free memory was 60.4MB in the beginning and 91.2MB in the end (delta: -30.9MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,267 INFO L158 Benchmark]: RCFGBuilder took 6709.63ms. Allocated memory was 127.9MB in the beginning and 658.5MB in the end (delta: 530.6MB). Free memory was 91.2MB in the beginning and 310.2MB in the end (delta: -219.0MB). Peak memory consumption was 404.4MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,268 INFO L158 Benchmark]: TraceAbstraction took 650.75ms. Allocated memory is still 658.5MB. Free memory was 309.2MB in the beginning and 264.1MB in the end (delta: 45.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2022-11-03 03:27:25,268 INFO L158 Benchmark]: Witness Printer took 4.48ms. Allocated memory is still 658.5MB. Free memory is still 264.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:27:25,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 127.9MB. Free memory is still 107.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 722.98ms. Allocated memory is still 127.9MB. Free memory was 89.6MB in the beginning and 77.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 145.08ms. Allocated memory is still 127.9MB. Free memory was 77.1MB in the beginning and 60.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 186.34ms. Allocated memory is still 127.9MB. Free memory was 60.4MB in the beginning and 91.2MB in the end (delta: -30.9MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. * RCFGBuilder took 6709.63ms. Allocated memory was 127.9MB in the beginning and 658.5MB in the end (delta: 530.6MB). Free memory was 91.2MB in the beginning and 310.2MB in the end (delta: -219.0MB). Peak memory consumption was 404.4MB. Max. memory is 16.1GB. * TraceAbstraction took 650.75ms. Allocated memory is still 658.5MB. Free memory was 309.2MB in the beginning and 264.1MB in the end (delta: 45.1MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * Witness Printer took 4.48ms. Allocated memory is still 658.5MB. Free memory is still 264.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 162, overapproximation of bitwiseAnd at line 157. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 5); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (5 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 12); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (12 - 1); [L34] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 3); [L35] const SORT_44 msb_SORT_44 = (SORT_44)1 << (3 - 1); [L37] const SORT_71 mask_SORT_71 = (SORT_71)-1 >> (sizeof(SORT_71) * 8 - 2); [L38] const SORT_71 msb_SORT_71 = (SORT_71)1 << (2 - 1); [L40] const SORT_73 mask_SORT_73 = (SORT_73)-1 >> (sizeof(SORT_73) * 8 - 32); [L41] const SORT_73 msb_SORT_73 = (SORT_73)1 << (32 - 1); [L43] const SORT_179 mask_SORT_179 = (SORT_179)-1 >> (sizeof(SORT_179) * 8 - 4); [L44] const SORT_179 msb_SORT_179 = (SORT_179)1 << (4 - 1); [L46] const SORT_3 var_7 = 0; [L47] const SORT_1 var_12 = 0; [L48] const SORT_1 var_23 = 1; [L49] const SORT_5 var_35 = 0; [L50] const SORT_44 var_45 = 0; [L51] const SORT_44 var_49 = 2; [L52] const SORT_44 var_53 = 1; [L53] const SORT_44 var_58 = 4; [L54] const SORT_44 var_60 = 5; [L55] const SORT_44 var_64 = 3; [L56] const SORT_73 var_75 = 0; [L57] const SORT_3 var_82 = 31; [L58] const SORT_44 var_272 = 7; [L59] const SORT_44 var_277 = 6; [L60] const SORT_3 var_330 = 2; [L62] SORT_1 input_2; [L63] SORT_3 input_4; [L64] SORT_5 input_6; [L65] SORT_3 input_68; [L66] SORT_3 input_69; [L67] SORT_3 input_70; [L68] SORT_3 input_81; [L69] SORT_3 input_91; [L70] SORT_3 input_92; [L71] SORT_3 input_93; [L72] SORT_3 input_96; [L73] SORT_3 input_115; [L74] SORT_3 input_116; [L75] SORT_3 input_117; [L76] SORT_3 input_120; [L77] SORT_3 input_122; [L78] SORT_71 input_136; [L79] SORT_71 input_137; [L80] SORT_71 input_138; [L82] SORT_3 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L83] SORT_3 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L84] SORT_3 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L85] SORT_3 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L86] SORT_3 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L87] SORT_3 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L88] SORT_3 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L89] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_5 state_36 = __VERIFIER_nondet_ushort() & mask_SORT_5; [L91] SORT_3 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L92] SORT_3 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L93] SORT_3 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L94] SORT_44 state_46 = __VERIFIER_nondet_uchar() & mask_SORT_44; [L96] SORT_3 init_9_arg_1 = var_7; [L97] state_8 = init_9_arg_1 [L98] SORT_3 init_11_arg_1 = var_7; [L99] state_10 = init_11_arg_1 [L100] SORT_3 init_15_arg_1 = var_7; [L101] state_14 = init_15_arg_1 [L102] SORT_3 init_17_arg_1 = var_7; [L103] state_16 = init_17_arg_1 [L104] SORT_3 init_28_arg_1 = var_7; [L105] state_27 = init_28_arg_1 [L106] SORT_3 init_30_arg_1 = var_7; [L107] state_29 = init_30_arg_1 [L108] SORT_3 init_32_arg_1 = var_7; [L109] state_31 = init_32_arg_1 [L110] SORT_1 init_34_arg_1 = var_12; [L111] state_33 = init_34_arg_1 [L112] SORT_5 init_37_arg_1 = var_35; [L113] state_36 = init_37_arg_1 [L114] SORT_3 init_39_arg_1 = var_7; [L115] state_38 = init_39_arg_1 [L116] SORT_3 init_41_arg_1 = var_7; [L117] state_40 = init_41_arg_1 [L118] SORT_3 init_43_arg_1 = var_7; [L119] state_42 = init_43_arg_1 [L120] SORT_44 init_47_arg_1 = var_45; [L121] state_46 = init_47_arg_1 VAL [init_11_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_37_arg_1=0, init_39_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_47_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_179=15, mask_SORT_3=31, mask_SORT_44=7, mask_SORT_5=4095, mask_SORT_71=3, mask_SORT_73=4294967295, msb_SORT_1=1, msb_SORT_179=8, msb_SORT_3=16, msb_SORT_44=4, msb_SORT_5=2048, msb_SORT_71=2, msb_SORT_73=2147483648, state_10=0, state_14=0, state_16=0, state_27=0, state_29=0, state_31=0, state_33=0, state_36=0, state_38=0, state_40=0, state_42=0, state_46=0, state_8=0, var_12=0, var_23=1, var_272=7, var_277=6, var_330=2, var_35=0, var_45=0, var_49=2, var_53=1, var_58=4, var_60=5, var_64=3, var_7=0, var_75=0, var_82=31] [L124] input_2 = __VERIFIER_nondet_uchar() [L125] input_4 = __VERIFIER_nondet_uchar() [L126] input_6 = __VERIFIER_nondet_ushort() [L127] input_68 = __VERIFIER_nondet_uchar() [L128] input_69 = __VERIFIER_nondet_uchar() [L129] input_70 = __VERIFIER_nondet_uchar() [L130] input_81 = __VERIFIER_nondet_uchar() [L131] input_91 = __VERIFIER_nondet_uchar() [L132] input_92 = __VERIFIER_nondet_uchar() [L133] input_93 = __VERIFIER_nondet_uchar() [L134] input_96 = __VERIFIER_nondet_uchar() [L135] input_115 = __VERIFIER_nondet_uchar() [L136] input_116 = __VERIFIER_nondet_uchar() [L137] input_117 = __VERIFIER_nondet_uchar() [L138] input_120 = __VERIFIER_nondet_uchar() [L139] input_122 = __VERIFIER_nondet_uchar() [L140] input_136 = __VERIFIER_nondet_uchar() [L141] input_137 = __VERIFIER_nondet_uchar() [L142] input_138 = __VERIFIER_nondet_uchar() [L145] SORT_1 var_18_arg_0 = var_12; [L146] SORT_3 var_18_arg_1 = state_16; [L147] SORT_3 var_18_arg_2 = state_14; [L148] EXPR var_18_arg_0 ? var_18_arg_1 : var_18_arg_2 [L148] SORT_3 var_18 = var_18_arg_0 ? var_18_arg_1 : var_18_arg_2; [L149] SORT_1 var_13_arg_0 = var_12; [L150] SORT_3 var_13_arg_1 = state_10; [L151] SORT_3 var_13_arg_2 = state_8; [L152] EXPR var_13_arg_0 ? var_13_arg_1 : var_13_arg_2 [L152] SORT_3 var_13 = var_13_arg_0 ? var_13_arg_1 : var_13_arg_2; [L153] SORT_1 var_19_arg_0 = var_12; [L154] SORT_3 var_19_arg_1 = var_18; [L155] SORT_3 var_19_arg_2 = var_13; [L156] EXPR var_19_arg_0 ? var_19_arg_1 : var_19_arg_2 [L156] SORT_3 var_19 = var_19_arg_0 ? var_19_arg_1 : var_19_arg_2; [L157] var_19 = var_19 & mask_SORT_3 [L158] SORT_3 var_20_arg_0 = var_19; [L159] SORT_3 var_20_arg_1 = var_7; [L160] SORT_1 var_20 = var_20_arg_0 == var_20_arg_1; [L161] SORT_1 var_24_arg_0 = var_20; [L162] SORT_1 var_24 = ~var_24_arg_0; [L163] SORT_1 var_25_arg_0 = var_23; [L164] SORT_1 var_25_arg_1 = var_24; [L165] SORT_1 var_25 = var_25_arg_0 & var_25_arg_1; [L166] var_25 = var_25 & mask_SORT_1 [L167] SORT_1 bad_26_arg_0 = var_25; [L168] CALL __VERIFIER_assert(!(bad_26_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:27:25,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bdf357eff96525f897a0fa54e5d16275a68a1cc63236862522df0c356d03bb1d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:27:27,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:27,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:27,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:27,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:27,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:27,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:27,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:27,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:27,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:27,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:27,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:27,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:27,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:27,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:27,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:27,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:27,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:27,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:27,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:27,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:27,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:27,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:27,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:27,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:27,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:27,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:27,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:27,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:27,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:27,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:27,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:27,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:27,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:27,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:27,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:27,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:27,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:27,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:27,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:27,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:27,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:27:27,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:27,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:27,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:27,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:27,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:27,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:27,947 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:27,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:27,948 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:27,948 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:27,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:27,949 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:27,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:27,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:27:27,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:27:27,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:27,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:27,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:27,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:27,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:27:27,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:27,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:27,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:27,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:27,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:27,954 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:27:27,954 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:27:27,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:27,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:27,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:27:27,955 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdf357eff96525f897a0fa54e5d16275a68a1cc63236862522df0c356d03bb1d [2022-11-03 03:27:28,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:28,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:28,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:28,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:28,338 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:28,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:28,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/1ba5b3bff/d2d9dd696072451a950269698023d53f/FLAG90d8584dd [2022-11-03 03:27:29,095 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:29,108 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:29,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/1ba5b3bff/d2d9dd696072451a950269698023d53f/FLAG90d8584dd [2022-11-03 03:27:29,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/data/1ba5b3bff/d2d9dd696072451a950269698023d53f [2022-11-03 03:27:29,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:29,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:29,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:29,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:29,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:29,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6077d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:29, skipping insertion in model container [2022-11-03 03:27:29,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:29" (1/1) ... [2022-11-03 03:27:29,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:29,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:29,579 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c[1107,1120] [2022-11-03 03:27:29,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:29,878 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:29,889 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p03.c[1107,1120] [2022-11-03 03:27:30,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:30,085 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:30,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30 WrapperNode [2022-11-03 03:27:30,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:30,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:30,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:30,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:30,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,216 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1395 [2022-11-03 03:27:30,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:30,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:30,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:30,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:30,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,280 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:30,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:30,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:30,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:30,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (1/1) ... [2022-11-03 03:27:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:30,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:30,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:30,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:30,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:30,825 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:30,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:31,839 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:31,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:31,849 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:27:31,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:31 BoogieIcfgContainer [2022-11-03 03:27:31,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:31,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:31,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:31,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:31,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:29" (1/3) ... [2022-11-03 03:27:31,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dde68f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:31, skipping insertion in model container [2022-11-03 03:27:31,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:30" (2/3) ... [2022-11-03 03:27:31,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dde68f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:31, skipping insertion in model container [2022-11-03 03:27:31,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:31" (3/3) ... [2022-11-03 03:27:31,862 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p03.c [2022-11-03 03:27:31,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:31,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:31,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:31,947 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6da2ba36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:31,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 189 states have (on average 1.4973544973544974) internal successors, (283), 190 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:27:31,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:31,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:31,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:31,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 03:27:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:31,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854658269] [2022-11-03 03:27:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:31,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:31,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:31,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:27:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:32,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:32,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:32,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854658269] [2022-11-03 03:27:32,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854658269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:32,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:32,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622891869] [2022-11-03 03:27:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:32,436 INFO L87 Difference]: Start difference. First operand has 191 states, 189 states have (on average 1.4973544973544974) internal successors, (283), 190 states have internal predecessors, (283), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:32,546 INFO L93 Difference]: Finished difference Result 377 states and 564 transitions. [2022-11-03 03:27:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 03:27:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:32,559 INFO L225 Difference]: With dead ends: 377 [2022-11-03 03:27:32,559 INFO L226 Difference]: Without dead ends: 188 [2022-11-03 03:27:32,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:32,566 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 547 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:32,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 271 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:27:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-03 03:27:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-11-03 03:27:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 276 transitions. [2022-11-03 03:27:32,610 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 276 transitions. Word has length 11 [2022-11-03 03:27:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:32,610 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 276 transitions. [2022-11-03 03:27:32,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 276 transitions. [2022-11-03 03:27:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:27:32,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:32,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:32,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:32,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 03:27:32,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:32,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732961893] [2022-11-03 03:27:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:32,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:32,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:27:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:33,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:33,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732961893] [2022-11-03 03:27:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732961893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:33,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:33,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958927701] [2022-11-03 03:27:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:33,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:33,105 INFO L87 Difference]: Start difference. First operand 187 states and 276 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:33,203 INFO L93 Difference]: Finished difference Result 375 states and 553 transitions. [2022-11-03 03:27:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 03:27:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:33,209 INFO L225 Difference]: With dead ends: 375 [2022-11-03 03:27:33,209 INFO L226 Difference]: Without dead ends: 190 [2022-11-03 03:27:33,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:33,215 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 543 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:33,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 272 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-03 03:27:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2022-11-03 03:27:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.478494623655914) internal successors, (275), 186 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 275 transitions. [2022-11-03 03:27:33,242 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 275 transitions. Word has length 11 [2022-11-03 03:27:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:33,242 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 275 transitions. [2022-11-03 03:27:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 275 transitions. [2022-11-03 03:27:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:27:33,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:33,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:33,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:33,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 03:27:33,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:33,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916734684] [2022-11-03 03:27:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:33,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:33,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:33,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:33,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:27:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:33,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:33,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:33,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916734684] [2022-11-03 03:27:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916734684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:33,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:33,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314908173] [2022-11-03 03:27:33,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:33,775 INFO L87 Difference]: Start difference. First operand 187 states and 275 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:33,841 INFO L93 Difference]: Finished difference Result 377 states and 553 transitions. [2022-11-03 03:27:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:33,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 03:27:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:33,844 INFO L225 Difference]: With dead ends: 377 [2022-11-03 03:27:33,844 INFO L226 Difference]: Without dead ends: 192 [2022-11-03 03:27:33,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:33,848 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 539 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:33,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 273 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:27:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-03 03:27:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2022-11-03 03:27:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4731182795698925) internal successors, (274), 186 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-11-03 03:27:33,867 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 11 [2022-11-03 03:27:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:33,867 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-11-03 03:27:33,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-11-03 03:27:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:27:33,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:33,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:33,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:34,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:34,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 03:27:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208143140] [2022-11-03 03:27:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:34,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:34,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:34,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:27:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:27:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:34,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:34,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208143140] [2022-11-03 03:27:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208143140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:34,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:34,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:27:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091915875] [2022-11-03 03:27:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:34,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:27:34,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:27:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:34,598 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:35,211 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2022-11-03 03:27:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:27:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 03:27:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:35,214 INFO L225 Difference]: With dead ends: 379 [2022-11-03 03:27:35,214 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 03:27:35,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:27:35,215 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1069 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:35,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 1653 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:27:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 03:27:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 195. [2022-11-03 03:27:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.4536082474226804) internal successors, (282), 194 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 282 transitions. [2022-11-03 03:27:35,230 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 282 transitions. Word has length 11 [2022-11-03 03:27:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:35,231 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 282 transitions. [2022-11-03 03:27:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 282 transitions. [2022-11-03 03:27:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:35,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:35,238 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:35,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:35,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:35,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1397725251, now seen corresponding path program 1 times [2022-11-03 03:27:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682526914] [2022-11-03 03:27:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:35,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:35,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:35,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:35,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:27:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:27:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:36,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:36,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682526914] [2022-11-03 03:27:36,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682526914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:36,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:36,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108711142] [2022-11-03 03:27:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:36,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:36,216 INFO L87 Difference]: Start difference. First operand 195 states and 282 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:36,369 INFO L93 Difference]: Finished difference Result 739 states and 1086 transitions. [2022-11-03 03:27:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:36,372 INFO L225 Difference]: With dead ends: 739 [2022-11-03 03:27:36,372 INFO L226 Difference]: Without dead ends: 554 [2022-11-03 03:27:36,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:36,374 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 789 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:36,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 1047 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-03 03:27:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 197. [2022-11-03 03:27:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4489795918367347) internal successors, (284), 196 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2022-11-03 03:27:36,385 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 194 [2022-11-03 03:27:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:36,385 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2022-11-03 03:27:36,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2022-11-03 03:27:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:36,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:36,389 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:36,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:36,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:36,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:36,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:36,607 INFO L85 PathProgramCache]: Analyzing trace with hash -240192961, now seen corresponding path program 1 times [2022-11-03 03:27:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:36,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216272679] [2022-11-03 03:27:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:36,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:36,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:27:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:27:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:37,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:37,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:37,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216272679] [2022-11-03 03:27:37,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216272679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:37,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:37,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:37,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598152268] [2022-11-03 03:27:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:37,384 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:37,785 INFO L93 Difference]: Finished difference Result 750 states and 1096 transitions. [2022-11-03 03:27:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:37,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:37,789 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:37,789 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:37,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:37,791 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 1064 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:37,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 1499 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 199. [2022-11-03 03:27:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4444444444444444) internal successors, (286), 198 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 286 transitions. [2022-11-03 03:27:37,800 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 286 transitions. Word has length 194 [2022-11-03 03:27:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:37,802 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 286 transitions. [2022-11-03 03:27:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 286 transitions. [2022-11-03 03:27:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:37,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:37,815 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:37,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:38,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1517434177, now seen corresponding path program 1 times [2022-11-03 03:27:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377289355] [2022-11-03 03:27:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:38,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:38,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:38,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:27:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:27:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:38,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:38,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377289355] [2022-11-03 03:27:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377289355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:38,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:38,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42463838] [2022-11-03 03:27:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:38,700 INFO L87 Difference]: Start difference. First operand 199 states and 286 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:38,875 INFO L93 Difference]: Finished difference Result 750 states and 1095 transitions. [2022-11-03 03:27:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:38,878 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:38,878 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:38,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:38,880 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1057 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:38,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1562 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 201. [2022-11-03 03:27:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.44) internal successors, (288), 200 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 288 transitions. [2022-11-03 03:27:38,889 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 288 transitions. Word has length 194 [2022-11-03 03:27:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:38,889 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 288 transitions. [2022-11-03 03:27:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 288 transitions. [2022-11-03 03:27:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:38,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:38,892 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:38,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:39,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 701386947, now seen corresponding path program 1 times [2022-11-03 03:27:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:39,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665052987] [2022-11-03 03:27:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:39,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:39,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:39,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:27:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:39,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:39,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:39,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665052987] [2022-11-03 03:27:39,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665052987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:39,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:39,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913145786] [2022-11-03 03:27:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:39,741 INFO L87 Difference]: Start difference. First operand 201 states and 288 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:39,957 INFO L93 Difference]: Finished difference Result 750 states and 1094 transitions. [2022-11-03 03:27:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:39,960 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:39,961 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:39,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:39,962 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1050 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:39,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 1558 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:27:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 203. [2022-11-03 03:27:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.4356435643564356) internal successors, (290), 202 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 290 transitions. [2022-11-03 03:27:39,971 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 290 transitions. Word has length 194 [2022-11-03 03:27:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:39,971 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 290 transitions. [2022-11-03 03:27:39,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 290 transitions. [2022-11-03 03:27:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:39,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:39,974 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:40,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:40,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:40,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1994431291, now seen corresponding path program 1 times [2022-11-03 03:27:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223865681] [2022-11-03 03:27:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:40,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:40,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:27:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:27:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:40,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:40,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:40,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223865681] [2022-11-03 03:27:40,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223865681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:40,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:40,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696073732] [2022-11-03 03:27:40,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:40,926 INFO L87 Difference]: Start difference. First operand 203 states and 290 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:41,131 INFO L93 Difference]: Finished difference Result 750 states and 1093 transitions. [2022-11-03 03:27:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:41,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:41,134 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:41,134 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:41,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:41,136 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1042 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:41,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 1555 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 205. [2022-11-03 03:27:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4313725490196079) internal successors, (292), 204 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 292 transitions. [2022-11-03 03:27:41,145 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 292 transitions. Word has length 194 [2022-11-03 03:27:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:41,145 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 292 transitions. [2022-11-03 03:27:41,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 292 transitions. [2022-11-03 03:27:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:41,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:41,148 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:41,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:41,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:41,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1974890169, now seen corresponding path program 1 times [2022-11-03 03:27:41,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:41,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136020793] [2022-11-03 03:27:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:41,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:41,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:41,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:41,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:27:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:27:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:42,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:42,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136020793] [2022-11-03 03:27:42,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136020793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:42,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:42,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:27:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102988454] [2022-11-03 03:27:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:42,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:27:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:27:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:42,068 INFO L87 Difference]: Start difference. First operand 205 states and 292 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:42,285 INFO L93 Difference]: Finished difference Result 576 states and 837 transitions. [2022-11-03 03:27:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:27:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:42,288 INFO L225 Difference]: With dead ends: 576 [2022-11-03 03:27:42,288 INFO L226 Difference]: Without dead ends: 391 [2022-11-03 03:27:42,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:27:42,289 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1048 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:42,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 1333 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-03 03:27:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 207. [2022-11-03 03:27:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 206 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 294 transitions. [2022-11-03 03:27:42,298 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 294 transitions. Word has length 194 [2022-11-03 03:27:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:42,298 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 294 transitions. [2022-11-03 03:27:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 294 transitions. [2022-11-03 03:27:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:42,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:42,301 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:42,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:42,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:42,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1792683077, now seen corresponding path program 1 times [2022-11-03 03:27:42,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667862990] [2022-11-03 03:27:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:42,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:42,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:27:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:27:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:43,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:43,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667862990] [2022-11-03 03:27:43,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667862990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:43,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:43,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:43,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272605808] [2022-11-03 03:27:43,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:43,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:43,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:43,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:43,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:43,141 INFO L87 Difference]: Start difference. First operand 207 states and 294 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:43,483 INFO L93 Difference]: Finished difference Result 750 states and 1091 transitions. [2022-11-03 03:27:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:43,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:43,486 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:43,487 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:43,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:43,488 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 1029 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:43,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 1479 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 209. [2022-11-03 03:27:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4230769230769231) internal successors, (296), 208 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 296 transitions. [2022-11-03 03:27:43,497 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 296 transitions. Word has length 194 [2022-11-03 03:27:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:43,498 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 296 transitions. [2022-11-03 03:27:43,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 296 transitions. [2022-11-03 03:27:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:43,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:43,501 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:43,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:43,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1853691449, now seen corresponding path program 1 times [2022-11-03 03:27:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:43,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097812318] [2022-11-03 03:27:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:43,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:43,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:43,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:27:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:27:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:44,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:44,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097812318] [2022-11-03 03:27:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097812318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:44,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:44,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851731567] [2022-11-03 03:27:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:44,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:44,292 INFO L87 Difference]: Start difference. First operand 209 states and 296 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:44,453 INFO L93 Difference]: Finished difference Result 750 states and 1090 transitions. [2022-11-03 03:27:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:44,456 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:44,456 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:44,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:44,458 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1022 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:44,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 1542 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 211. [2022-11-03 03:27:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4190476190476191) internal successors, (298), 210 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 298 transitions. [2022-11-03 03:27:44,469 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 298 transitions. Word has length 194 [2022-11-03 03:27:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:44,470 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 298 transitions. [2022-11-03 03:27:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 298 transitions. [2022-11-03 03:27:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:44,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:44,473 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:44,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:44,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:44,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1763631159, now seen corresponding path program 1 times [2022-11-03 03:27:44,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155573767] [2022-11-03 03:27:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:44,681 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:44,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:27:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:45,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:45,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:45,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155573767] [2022-11-03 03:27:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155573767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:45,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:45,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207808195] [2022-11-03 03:27:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:45,276 INFO L87 Difference]: Start difference. First operand 211 states and 298 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:45,464 INFO L93 Difference]: Finished difference Result 758 states and 1101 transitions. [2022-11-03 03:27:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:45,467 INFO L225 Difference]: With dead ends: 758 [2022-11-03 03:27:45,467 INFO L226 Difference]: Without dead ends: 573 [2022-11-03 03:27:45,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:45,469 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1031 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:45,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1549 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-03 03:27:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 213. [2022-11-03 03:27:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4150943396226414) internal successors, (300), 212 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 300 transitions. [2022-11-03 03:27:45,479 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 300 transitions. Word has length 194 [2022-11-03 03:27:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:45,479 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 300 transitions. [2022-11-03 03:27:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 300 transitions. [2022-11-03 03:27:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:45,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:45,482 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:45,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:45,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:45,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1123610187, now seen corresponding path program 1 times [2022-11-03 03:27:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:45,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225135597] [2022-11-03 03:27:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:45,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:45,702 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:45,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:27:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:27:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:46,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:46,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225135597] [2022-11-03 03:27:46,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225135597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:46,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:46,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635283967] [2022-11-03 03:27:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:46,471 INFO L87 Difference]: Start difference. First operand 213 states and 300 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:46,613 INFO L93 Difference]: Finished difference Result 739 states and 1077 transitions. [2022-11-03 03:27:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:46,616 INFO L225 Difference]: With dead ends: 739 [2022-11-03 03:27:46,616 INFO L226 Difference]: Without dead ends: 554 [2022-11-03 03:27:46,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:46,617 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 735 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:46,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1038 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-03 03:27:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 215. [2022-11-03 03:27:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.411214953271028) internal successors, (302), 214 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 302 transitions. [2022-11-03 03:27:46,626 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 302 transitions. Word has length 194 [2022-11-03 03:27:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:46,627 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 302 transitions. [2022-11-03 03:27:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 302 transitions. [2022-11-03 03:27:46,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:46,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:46,630 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:46,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 03:27:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:46,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash -799640243, now seen corresponding path program 1 times [2022-11-03 03:27:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:46,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163688597] [2022-11-03 03:27:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:46,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:46,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:27:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:27:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:47,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:47,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:47,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163688597] [2022-11-03 03:27:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163688597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:47,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:47,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144435567] [2022-11-03 03:27:47,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:47,450 INFO L87 Difference]: Start difference. First operand 215 states and 302 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:47,611 INFO L93 Difference]: Finished difference Result 750 states and 1087 transitions. [2022-11-03 03:27:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:47,615 INFO L225 Difference]: With dead ends: 750 [2022-11-03 03:27:47,615 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:27:47,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:47,618 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1001 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:47,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1530 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:27:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 217. [2022-11-03 03:27:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4074074074074074) internal successors, (304), 216 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 304 transitions. [2022-11-03 03:27:47,628 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 304 transitions. Word has length 194 [2022-11-03 03:27:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:47,630 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 304 transitions. [2022-11-03 03:27:47,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 304 transitions. [2022-11-03 03:27:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:47,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:47,632 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:47,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:47,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash -301083441, now seen corresponding path program 1 times [2022-11-03 03:27:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:47,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459115094] [2022-11-03 03:27:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:47,852 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:47,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:27:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:48,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:48,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:48,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459115094] [2022-11-03 03:27:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459115094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:48,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:48,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830025582] [2022-11-03 03:27:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:48,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:48,488 INFO L87 Difference]: Start difference. First operand 217 states and 304 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:48,693 INFO L93 Difference]: Finished difference Result 768 states and 1113 transitions. [2022-11-03 03:27:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:48,696 INFO L225 Difference]: With dead ends: 768 [2022-11-03 03:27:48,697 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 03:27:48,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:48,698 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 1030 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:48,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1551 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:27:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 03:27:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 219. [2022-11-03 03:27:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.4036697247706422) internal successors, (306), 218 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 306 transitions. [2022-11-03 03:27:48,707 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 306 transitions. Word has length 194 [2022-11-03 03:27:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:48,708 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 306 transitions. [2022-11-03 03:27:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 306 transitions. [2022-11-03 03:27:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:48,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:48,710 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:48,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:48,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:48,919 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1102785745, now seen corresponding path program 1 times [2022-11-03 03:27:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967943291] [2022-11-03 03:27:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:48,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:48,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:48,925 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:48,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:27:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:27:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:49,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:49,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967943291] [2022-11-03 03:27:49,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967943291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:49,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:49,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:27:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048929693] [2022-11-03 03:27:49,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:49,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:27:49,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:49,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:27:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:27:49,714 INFO L87 Difference]: Start difference. First operand 219 states and 306 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:50,590 INFO L93 Difference]: Finished difference Result 1182 states and 1718 transitions. [2022-11-03 03:27:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:27:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:50,593 INFO L225 Difference]: With dead ends: 1182 [2022-11-03 03:27:50,593 INFO L226 Difference]: Without dead ends: 997 [2022-11-03 03:27:50,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:27:50,594 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 2941 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2941 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:50,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2941 Valid, 3444 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:27:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-03 03:27:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 237. [2022-11-03 03:27:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.4067796610169492) internal successors, (332), 236 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 332 transitions. [2022-11-03 03:27:50,606 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 332 transitions. Word has length 194 [2022-11-03 03:27:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:50,606 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 332 transitions. [2022-11-03 03:27:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 332 transitions. [2022-11-03 03:27:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:50,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:50,608 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:50,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:50,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:50,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1770167635, now seen corresponding path program 1 times [2022-11-03 03:27:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121971296] [2022-11-03 03:27:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:50,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:50,826 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:27:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:27:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:51,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:51,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121971296] [2022-11-03 03:27:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121971296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:51,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:51,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629840258] [2022-11-03 03:27:51,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:51,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:51,592 INFO L87 Difference]: Start difference. First operand 237 states and 332 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:51,772 INFO L93 Difference]: Finished difference Result 833 states and 1205 transitions. [2022-11-03 03:27:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:51,775 INFO L225 Difference]: With dead ends: 833 [2022-11-03 03:27:51,775 INFO L226 Difference]: Without dead ends: 630 [2022-11-03 03:27:51,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:51,776 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1016 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1555 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-03 03:27:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 241. [2022-11-03 03:27:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4) internal successors, (336), 240 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2022-11-03 03:27:51,787 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 194 [2022-11-03 03:27:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:51,787 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2022-11-03 03:27:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2022-11-03 03:27:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:51,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:51,789 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:51,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:52,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:52,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2114995797, now seen corresponding path program 1 times [2022-11-03 03:27:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37376575] [2022-11-03 03:27:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:52,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:52,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:27:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:52,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:52,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37376575] [2022-11-03 03:27:52,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37376575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:52,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:52,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:52,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816926598] [2022-11-03 03:27:52,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:52,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:52,690 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:52,874 INFO L93 Difference]: Finished difference Result 848 states and 1226 transitions. [2022-11-03 03:27:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:52,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:52,877 INFO L225 Difference]: With dead ends: 848 [2022-11-03 03:27:52,877 INFO L226 Difference]: Without dead ends: 645 [2022-11-03 03:27:52,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:52,881 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 1020 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:52,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1547 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-03 03:27:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 245. [2022-11-03 03:27:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.3975409836065573) internal successors, (341), 244 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2022-11-03 03:27:52,891 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 194 [2022-11-03 03:27:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:52,891 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2022-11-03 03:27:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2022-11-03 03:27:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:52,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:52,893 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:52,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:53,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 709804119, now seen corresponding path program 1 times [2022-11-03 03:27:53,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:53,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816974286] [2022-11-03 03:27:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:53,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:53,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:53,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:53,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:27:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:27:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:53,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:53,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816974286] [2022-11-03 03:27:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816974286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:53,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:53,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:27:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485340571] [2022-11-03 03:27:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:27:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:27:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:27:53,892 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:54,726 INFO L93 Difference]: Finished difference Result 1216 states and 1763 transitions. [2022-11-03 03:27:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:27:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:54,730 INFO L225 Difference]: With dead ends: 1216 [2022-11-03 03:27:54,730 INFO L226 Difference]: Without dead ends: 1013 [2022-11-03 03:27:54,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:27:54,732 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2424 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:54,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 3474 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:27:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-11-03 03:27:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 253. [2022-11-03 03:27:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.3968253968253967) internal successors, (352), 252 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 352 transitions. [2022-11-03 03:27:54,745 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 352 transitions. Word has length 194 [2022-11-03 03:27:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:54,745 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 352 transitions. [2022-11-03 03:27:54,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 352 transitions. [2022-11-03 03:27:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:54,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:54,747 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:54,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:54,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2138582311, now seen corresponding path program 1 times [2022-11-03 03:27:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:54,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207807618] [2022-11-03 03:27:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:54,968 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:54,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:27:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:55,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:27:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:55,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:55,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207807618] [2022-11-03 03:27:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207807618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:55,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:55,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517290064] [2022-11-03 03:27:55,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:55,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:55,604 INFO L87 Difference]: Start difference. First operand 253 states and 352 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:55,792 INFO L93 Difference]: Finished difference Result 828 states and 1192 transitions. [2022-11-03 03:27:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:55,800 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:27:55,803 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:27:55,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:55,805 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 954 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:55,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1518 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:27:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 257. [2022-11-03 03:27:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.390625) internal successors, (356), 256 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 356 transitions. [2022-11-03 03:27:55,819 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 356 transitions. Word has length 194 [2022-11-03 03:27:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:55,820 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 356 transitions. [2022-11-03 03:27:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 356 transitions. [2022-11-03 03:27:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:55,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:55,822 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:55,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:56,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:56,035 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1752719909, now seen corresponding path program 1 times [2022-11-03 03:27:56,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075998018] [2022-11-03 03:27:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:56,038 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:56,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:27:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:27:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:56,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:56,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075998018] [2022-11-03 03:27:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075998018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:56,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:56,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:56,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180308695] [2022-11-03 03:27:56,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:56,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:56,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:56,659 INFO L87 Difference]: Start difference. First operand 257 states and 356 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:56,973 INFO L93 Difference]: Finished difference Result 828 states and 1191 transitions. [2022-11-03 03:27:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:56,977 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:27:56,977 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:27:56,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:56,979 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 947 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:56,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1432 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:27:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 259. [2022-11-03 03:27:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.3875968992248062) internal successors, (358), 258 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 358 transitions. [2022-11-03 03:27:56,991 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 358 transitions. Word has length 194 [2022-11-03 03:27:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:56,992 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 358 transitions. [2022-11-03 03:27:56,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 358 transitions. [2022-11-03 03:27:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:56,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:56,994 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:57,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 03:27:57,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:57,212 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash 178405725, now seen corresponding path program 1 times [2022-11-03 03:27:57,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:57,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677138919] [2022-11-03 03:27:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:57,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:57,214 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:57,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:27:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:27:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:57,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:57,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677138919] [2022-11-03 03:27:57,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677138919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:57,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:57,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641221031] [2022-11-03 03:27:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:57,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:57,803 INFO L87 Difference]: Start difference. First operand 259 states and 358 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:57,961 INFO L93 Difference]: Finished difference Result 828 states and 1190 transitions. [2022-11-03 03:27:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:57,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:57,965 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:27:57,966 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:27:57,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:57,967 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 940 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:57,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1495 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:27:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 261. [2022-11-03 03:27:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.3846153846153846) internal successors, (360), 260 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 360 transitions. [2022-11-03 03:27:57,979 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 360 transitions. Word has length 194 [2022-11-03 03:27:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:57,979 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 360 transitions. [2022-11-03 03:27:57,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 360 transitions. [2022-11-03 03:27:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:57,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:57,981 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:57,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:27:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:58,199 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2075385183, now seen corresponding path program 1 times [2022-11-03 03:27:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058065979] [2022-11-03 03:27:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:58,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:58,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:27:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:27:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:58,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:58,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:58,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058065979] [2022-11-03 03:27:58,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058065979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:58,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:58,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438066266] [2022-11-03 03:27:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:58,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:58,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:58,836 INFO L87 Difference]: Start difference. First operand 261 states and 360 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:59,028 INFO L93 Difference]: Finished difference Result 888 states and 1277 transitions. [2022-11-03 03:27:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:27:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:27:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:59,032 INFO L225 Difference]: With dead ends: 888 [2022-11-03 03:27:59,032 INFO L226 Difference]: Without dead ends: 677 [2022-11-03 03:27:59,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:59,034 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 1000 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:59,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1538 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:27:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-03 03:27:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 263. [2022-11-03 03:27:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.381679389312977) internal successors, (362), 262 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 362 transitions. [2022-11-03 03:27:59,047 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 362 transitions. Word has length 194 [2022-11-03 03:27:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:59,047 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 362 transitions. [2022-11-03 03:27:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:27:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 362 transitions. [2022-11-03 03:27:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:27:59,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:59,049 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:59,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:59,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:27:59,267 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1793027615, now seen corresponding path program 1 times [2022-11-03 03:27:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:27:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666735462] [2022-11-03 03:27:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:59,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:27:59,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:27:59,271 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:27:59,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:27:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:59,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:27:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:59,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:59,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:27:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666735462] [2022-11-03 03:27:59,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666735462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:59,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:59,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267142969] [2022-11-03 03:27:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:59,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:27:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:59,904 INFO L87 Difference]: Start difference. First operand 263 states and 362 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:00,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:00,240 INFO L93 Difference]: Finished difference Result 828 states and 1188 transitions. [2022-11-03 03:28:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:00,243 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:28:00,244 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:28:00,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:00,245 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 916 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:00,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1414 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:28:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:28:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 269. [2022-11-03 03:28:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3805970149253732) internal successors, (370), 268 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2022-11-03 03:28:00,257 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 194 [2022-11-03 03:28:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:00,257 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2022-11-03 03:28:00,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2022-11-03 03:28:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:00,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:00,259 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:00,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 03:28:00,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:00,476 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1723379741, now seen corresponding path program 1 times [2022-11-03 03:28:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:00,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436011409] [2022-11-03 03:28:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:00,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:00,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:00,478 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:28:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:01,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:01,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436011409] [2022-11-03 03:28:01,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436011409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:01,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:01,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:01,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924106113] [2022-11-03 03:28:01,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:01,051 INFO L87 Difference]: Start difference. First operand 269 states and 370 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:01,193 INFO L93 Difference]: Finished difference Result 828 states and 1187 transitions. [2022-11-03 03:28:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:01,196 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:28:01,196 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:28:01,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:01,197 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 909 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:01,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1477 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:28:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 271. [2022-11-03 03:28:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3777777777777778) internal successors, (372), 270 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 372 transitions. [2022-11-03 03:28:01,209 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 372 transitions. Word has length 194 [2022-11-03 03:28:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:01,209 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 372 transitions. [2022-11-03 03:28:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 372 transitions. [2022-11-03 03:28:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:01,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:01,211 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:01,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:01,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:01,423 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -324426139, now seen corresponding path program 1 times [2022-11-03 03:28:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:01,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26812763] [2022-11-03 03:28:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:01,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:01,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:01,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:28:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:28:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:02,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:02,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26812763] [2022-11-03 03:28:02,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26812763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:02,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:02,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047019176] [2022-11-03 03:28:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:02,081 INFO L87 Difference]: Start difference. First operand 271 states and 372 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:02,264 INFO L93 Difference]: Finished difference Result 896 states and 1286 transitions. [2022-11-03 03:28:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:02,267 INFO L225 Difference]: With dead ends: 896 [2022-11-03 03:28:02,267 INFO L226 Difference]: Without dead ends: 685 [2022-11-03 03:28:02,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:02,268 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 985 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:02,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 1531 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-03 03:28:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 273. [2022-11-03 03:28:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.375) internal successors, (374), 272 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 374 transitions. [2022-11-03 03:28:02,281 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 374 transitions. Word has length 194 [2022-11-03 03:28:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:02,281 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 374 transitions. [2022-11-03 03:28:02,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 374 transitions. [2022-11-03 03:28:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:02,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:02,283 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:02,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:02,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:02,496 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash 39040359, now seen corresponding path program 1 times [2022-11-03 03:28:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:02,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74758158] [2022-11-03 03:28:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:02,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:02,499 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:02,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:28:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:02,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:03,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:03,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:03,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74758158] [2022-11-03 03:28:03,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74758158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:03,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:03,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:03,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66263821] [2022-11-03 03:28:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:03,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:03,196 INFO L87 Difference]: Start difference. First operand 273 states and 374 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:03,364 INFO L93 Difference]: Finished difference Result 857 states and 1228 transitions. [2022-11-03 03:28:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:03,367 INFO L225 Difference]: With dead ends: 857 [2022-11-03 03:28:03,367 INFO L226 Difference]: Without dead ends: 646 [2022-11-03 03:28:03,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:03,368 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 931 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:03,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1506 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-11-03 03:28:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 275. [2022-11-03 03:28:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.3722627737226278) internal successors, (376), 274 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 376 transitions. [2022-11-03 03:28:03,380 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 376 transitions. Word has length 194 [2022-11-03 03:28:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:03,380 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 376 transitions. [2022-11-03 03:28:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 376 transitions. [2022-11-03 03:28:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:03,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:03,385 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:03,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:03,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:03,595 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -505832215, now seen corresponding path program 1 times [2022-11-03 03:28:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098909834] [2022-11-03 03:28:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:03,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:03,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:03,598 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:03,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:28:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:04,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:04,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098909834] [2022-11-03 03:28:04,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098909834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:04,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:04,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157061250] [2022-11-03 03:28:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:04,163 INFO L87 Difference]: Start difference. First operand 275 states and 376 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:04,309 INFO L93 Difference]: Finished difference Result 828 states and 1184 transitions. [2022-11-03 03:28:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:04,311 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:28:04,312 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 03:28:04,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:04,313 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 888 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:04,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1465 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 03:28:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 277. [2022-11-03 03:28:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3695652173913044) internal successors, (378), 276 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 378 transitions. [2022-11-03 03:28:04,325 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 378 transitions. Word has length 194 [2022-11-03 03:28:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:04,326 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 378 transitions. [2022-11-03 03:28:04,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 378 transitions. [2022-11-03 03:28:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:04,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:04,327 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:04,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:04,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:04,545 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1453884181, now seen corresponding path program 1 times [2022-11-03 03:28:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:04,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144058992] [2022-11-03 03:28:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:04,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:04,548 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:04,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:28:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:28:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:05,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:05,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144058992] [2022-11-03 03:28:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144058992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:05,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:05,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:05,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891135706] [2022-11-03 03:28:05,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:05,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:05,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:05,224 INFO L87 Difference]: Start difference. First operand 277 states and 378 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:05,399 INFO L93 Difference]: Finished difference Result 906 states and 1298 transitions. [2022-11-03 03:28:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:05,402 INFO L225 Difference]: With dead ends: 906 [2022-11-03 03:28:05,403 INFO L226 Difference]: Without dead ends: 695 [2022-11-03 03:28:05,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:05,403 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 982 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:05,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1533 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-03 03:28:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 279. [2022-11-03 03:28:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3669064748201438) internal successors, (380), 278 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 380 transitions. [2022-11-03 03:28:05,415 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 380 transitions. Word has length 194 [2022-11-03 03:28:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:05,416 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 380 transitions. [2022-11-03 03:28:05,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 380 transitions. [2022-11-03 03:28:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:05,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:05,418 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:05,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:05,636 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1888389779, now seen corresponding path program 1 times [2022-11-03 03:28:05,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945793133] [2022-11-03 03:28:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:05,639 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:05,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:28:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:28:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:06,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:06,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:06,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945793133] [2022-11-03 03:28:06,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945793133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:06,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:06,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:06,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944183336] [2022-11-03 03:28:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:06,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:06,351 INFO L87 Difference]: Start difference. First operand 279 states and 380 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:07,148 INFO L93 Difference]: Finished difference Result 1276 states and 1839 transitions. [2022-11-03 03:28:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:28:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:07,150 INFO L225 Difference]: With dead ends: 1276 [2022-11-03 03:28:07,150 INFO L226 Difference]: Without dead ends: 1065 [2022-11-03 03:28:07,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:28:07,152 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 2452 mSDsluCounter, 3184 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:07,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 3608 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:28:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-03 03:28:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 305. [2022-11-03 03:28:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.375) internal successors, (418), 304 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 418 transitions. [2022-11-03 03:28:07,166 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 418 transitions. Word has length 194 [2022-11-03 03:28:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:07,167 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 418 transitions. [2022-11-03 03:28:07,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 418 transitions. [2022-11-03 03:28:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:07,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:07,169 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:07,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 03:28:07,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:07,379 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1699980911, now seen corresponding path program 1 times [2022-11-03 03:28:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418752919] [2022-11-03 03:28:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:07,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:07,382 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:28:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:08,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:08,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418752919] [2022-11-03 03:28:08,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418752919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:08,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:08,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361682652] [2022-11-03 03:28:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:08,148 INFO L87 Difference]: Start difference. First operand 305 states and 418 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:08,996 INFO L93 Difference]: Finished difference Result 1508 states and 2172 transitions. [2022-11-03 03:28:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:08,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:08,998 INFO L225 Difference]: With dead ends: 1508 [2022-11-03 03:28:08,998 INFO L226 Difference]: Without dead ends: 1271 [2022-11-03 03:28:08,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:09,000 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 2379 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:09,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2942 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-03 03:28:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 365. [2022-11-03 03:28:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.3873626373626373) internal successors, (505), 364 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 505 transitions. [2022-11-03 03:28:09,016 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 505 transitions. Word has length 194 [2022-11-03 03:28:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:09,016 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 505 transitions. [2022-11-03 03:28:09,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 505 transitions. [2022-11-03 03:28:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:09,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:09,018 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:09,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:09,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:09,231 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:09,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2106939279, now seen corresponding path program 1 times [2022-11-03 03:28:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261640451] [2022-11-03 03:28:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:09,234 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:09,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:28:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:10,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:10,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261640451] [2022-11-03 03:28:10,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261640451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:10,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:10,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552269785] [2022-11-03 03:28:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:10,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:10,043 INFO L87 Difference]: Start difference. First operand 365 states and 505 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:10,892 INFO L93 Difference]: Finished difference Result 1570 states and 2260 transitions. [2022-11-03 03:28:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:10,894 INFO L225 Difference]: With dead ends: 1570 [2022-11-03 03:28:10,894 INFO L226 Difference]: Without dead ends: 1273 [2022-11-03 03:28:10,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:10,896 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 2379 mSDsluCounter, 2567 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:10,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2947 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-11-03 03:28:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 367. [2022-11-03 03:28:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.3852459016393444) internal successors, (507), 366 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 507 transitions. [2022-11-03 03:28:10,912 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 507 transitions. Word has length 194 [2022-11-03 03:28:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:10,912 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 507 transitions. [2022-11-03 03:28:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 507 transitions. [2022-11-03 03:28:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:10,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:10,914 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:10,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:11,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:11,131 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash 905855731, now seen corresponding path program 1 times [2022-11-03 03:28:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959251569] [2022-11-03 03:28:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:11,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:11,134 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:28:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:11,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:11,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959251569] [2022-11-03 03:28:11,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959251569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:11,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:11,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613318747] [2022-11-03 03:28:11,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:11,894 INFO L87 Difference]: Start difference. First operand 367 states and 507 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:12,753 INFO L93 Difference]: Finished difference Result 1574 states and 2263 transitions. [2022-11-03 03:28:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:12,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:12,755 INFO L225 Difference]: With dead ends: 1574 [2022-11-03 03:28:12,755 INFO L226 Difference]: Without dead ends: 1275 [2022-11-03 03:28:12,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:12,756 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 2379 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:12,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2952 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-03 03:28:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 369. [2022-11-03 03:28:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3831521739130435) internal successors, (509), 368 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 509 transitions. [2022-11-03 03:28:12,771 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 509 transitions. Word has length 194 [2022-11-03 03:28:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:12,772 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 509 transitions. [2022-11-03 03:28:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 509 transitions. [2022-11-03 03:28:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:12,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:12,774 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:12,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:12,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:12,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash -816146955, now seen corresponding path program 1 times [2022-11-03 03:28:12,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:12,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710555600] [2022-11-03 03:28:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:12,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:12,994 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:13,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:28:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:13,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:13,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:13,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:13,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710555600] [2022-11-03 03:28:13,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710555600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:13,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:13,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5430867] [2022-11-03 03:28:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:13,788 INFO L87 Difference]: Start difference. First operand 369 states and 509 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:14,669 INFO L93 Difference]: Finished difference Result 1578 states and 2266 transitions. [2022-11-03 03:28:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:14,673 INFO L225 Difference]: With dead ends: 1578 [2022-11-03 03:28:14,673 INFO L226 Difference]: Without dead ends: 1277 [2022-11-03 03:28:14,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:14,674 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 2379 mSDsluCounter, 2569 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2957 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-11-03 03:28:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 371. [2022-11-03 03:28:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.3810810810810812) internal successors, (511), 370 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 511 transitions. [2022-11-03 03:28:14,689 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 511 transitions. Word has length 194 [2022-11-03 03:28:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:14,690 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 511 transitions. [2022-11-03 03:28:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 511 transitions. [2022-11-03 03:28:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:14,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:14,691 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:14,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:14,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:14,903 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1112785271, now seen corresponding path program 1 times [2022-11-03 03:28:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971874875] [2022-11-03 03:28:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:14,905 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:14,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:28:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:15,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:15,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:15,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971874875] [2022-11-03 03:28:15,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971874875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:15,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:15,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79575468] [2022-11-03 03:28:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:15,655 INFO L87 Difference]: Start difference. First operand 371 states and 511 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:16,489 INFO L93 Difference]: Finished difference Result 1582 states and 2269 transitions. [2022-11-03 03:28:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:16,494 INFO L225 Difference]: With dead ends: 1582 [2022-11-03 03:28:16,495 INFO L226 Difference]: Without dead ends: 1279 [2022-11-03 03:28:16,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:16,496 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 2379 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:16,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 2962 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-11-03 03:28:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 373. [2022-11-03 03:28:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.3790322580645162) internal successors, (513), 372 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 513 transitions. [2022-11-03 03:28:16,511 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 513 transitions. Word has length 194 [2022-11-03 03:28:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:16,512 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 513 transitions. [2022-11-03 03:28:16,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 513 transitions. [2022-11-03 03:28:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:16,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:16,514 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:16,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 03:28:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:16,727 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1455037063, now seen corresponding path program 1 times [2022-11-03 03:28:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242338497] [2022-11-03 03:28:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:16,731 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:16,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:28:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:17,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:17,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:17,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242338497] [2022-11-03 03:28:17,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242338497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:17,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:17,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065177430] [2022-11-03 03:28:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:17,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:17,510 INFO L87 Difference]: Start difference. First operand 373 states and 513 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:18,576 INFO L93 Difference]: Finished difference Result 1720 states and 2472 transitions. [2022-11-03 03:28:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:18,581 INFO L225 Difference]: With dead ends: 1720 [2022-11-03 03:28:18,581 INFO L226 Difference]: Without dead ends: 1415 [2022-11-03 03:28:18,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:18,583 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 2681 mSDsluCounter, 3529 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2681 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:18,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2681 Valid, 3925 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-03 03:28:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 375. [2022-11-03 03:28:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.3770053475935828) internal successors, (515), 374 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2022-11-03 03:28:18,603 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 194 [2022-11-03 03:28:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:18,604 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2022-11-03 03:28:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2022-11-03 03:28:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:18,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:18,606 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:18,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:18,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:18,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1192567291, now seen corresponding path program 1 times [2022-11-03 03:28:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352094635] [2022-11-03 03:28:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:18,822 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:18,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 03:28:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:19,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:19,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352094635] [2022-11-03 03:28:19,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352094635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:19,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:19,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300835152] [2022-11-03 03:28:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:19,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:19,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:19,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:19,586 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:20,690 INFO L93 Difference]: Finished difference Result 1738 states and 2494 transitions. [2022-11-03 03:28:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:20,694 INFO L225 Difference]: With dead ends: 1738 [2022-11-03 03:28:20,694 INFO L226 Difference]: Without dead ends: 1431 [2022-11-03 03:28:20,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:20,698 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 2692 mSDsluCounter, 3534 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:20,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2692 Valid, 3940 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:28:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-11-03 03:28:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 379. [2022-11-03 03:28:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.3756613756613756) internal successors, (520), 378 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 520 transitions. [2022-11-03 03:28:20,720 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 520 transitions. Word has length 194 [2022-11-03 03:28:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:20,721 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 520 transitions. [2022-11-03 03:28:20,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 520 transitions. [2022-11-03 03:28:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:20,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:20,722 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:20,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:20,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:20,923 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash -949293187, now seen corresponding path program 1 times [2022-11-03 03:28:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:20,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97502538] [2022-11-03 03:28:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:20,925 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:20,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:28:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:21,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:21,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:21,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97502538] [2022-11-03 03:28:21,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97502538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:21,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:21,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809988516] [2022-11-03 03:28:21,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:21,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:21,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:21,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:21,779 INFO L87 Difference]: Start difference. First operand 379 states and 520 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:22,838 INFO L93 Difference]: Finished difference Result 1750 states and 2508 transitions. [2022-11-03 03:28:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:22,841 INFO L225 Difference]: With dead ends: 1750 [2022-11-03 03:28:22,842 INFO L226 Difference]: Without dead ends: 1439 [2022-11-03 03:28:22,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:22,843 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 2695 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:22,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2695 Valid, 3945 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-11-03 03:28:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 381. [2022-11-03 03:28:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.3736842105263158) internal successors, (522), 380 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 522 transitions. [2022-11-03 03:28:22,856 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 522 transitions. Word has length 194 [2022-11-03 03:28:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:22,857 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 522 transitions. [2022-11-03 03:28:22,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 522 transitions. [2022-11-03 03:28:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:22,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:22,858 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:22,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:23,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:23,076 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash -830851713, now seen corresponding path program 1 times [2022-11-03 03:28:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:23,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917571433] [2022-11-03 03:28:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:23,079 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:28:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:23,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:23,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:23,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917571433] [2022-11-03 03:28:23,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917571433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:23,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539127339] [2022-11-03 03:28:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:23,832 INFO L87 Difference]: Start difference. First operand 381 states and 522 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:24,705 INFO L93 Difference]: Finished difference Result 1602 states and 2287 transitions. [2022-11-03 03:28:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:24,707 INFO L225 Difference]: With dead ends: 1602 [2022-11-03 03:28:24,707 INFO L226 Difference]: Without dead ends: 1289 [2022-11-03 03:28:24,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:24,708 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 2383 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:24,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2383 Valid, 2992 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-11-03 03:28:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 383. [2022-11-03 03:28:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3717277486910995) internal successors, (524), 382 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 524 transitions. [2022-11-03 03:28:24,722 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 524 transitions. Word has length 194 [2022-11-03 03:28:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:24,723 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 524 transitions. [2022-11-03 03:28:24,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 524 transitions. [2022-11-03 03:28:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:24,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:24,724 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:24,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:24,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:24,931 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1430721537, now seen corresponding path program 1 times [2022-11-03 03:28:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:24,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6190197] [2022-11-03 03:28:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:24,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:24,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:24,933 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:24,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:28:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:25,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:25,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6190197] [2022-11-03 03:28:25,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6190197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:25,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532113363] [2022-11-03 03:28:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:25,738 INFO L87 Difference]: Start difference. First operand 383 states and 524 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:26,790 INFO L93 Difference]: Finished difference Result 1740 states and 2490 transitions. [2022-11-03 03:28:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:26,792 INFO L225 Difference]: With dead ends: 1740 [2022-11-03 03:28:26,792 INFO L226 Difference]: Without dead ends: 1425 [2022-11-03 03:28:26,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:26,793 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 2681 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2681 SdHoareTripleChecker+Valid, 3935 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:26,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2681 Valid, 3935 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-11-03 03:28:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 385. [2022-11-03 03:28:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.3697916666666667) internal successors, (526), 384 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 526 transitions. [2022-11-03 03:28:26,808 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 526 transitions. Word has length 194 [2022-11-03 03:28:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:26,809 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 526 transitions. [2022-11-03 03:28:26,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 526 transitions. [2022-11-03 03:28:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:26,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:26,811 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:26,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:27,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:27,029 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 123579139, now seen corresponding path program 1 times [2022-11-03 03:28:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139308020] [2022-11-03 03:28:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:27,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:27,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:27,032 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:27,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:28:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:27,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:27,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:27,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139308020] [2022-11-03 03:28:27,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139308020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:27,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:27,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811841180] [2022-11-03 03:28:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:27,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:27,855 INFO L87 Difference]: Start difference. First operand 385 states and 526 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:28,907 INFO L93 Difference]: Finished difference Result 1750 states and 2501 transitions. [2022-11-03 03:28:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:28,910 INFO L225 Difference]: With dead ends: 1750 [2022-11-03 03:28:28,911 INFO L226 Difference]: Without dead ends: 1433 [2022-11-03 03:28:28,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:28,912 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 2684 mSDsluCounter, 3518 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 3940 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:28,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 3940 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-11-03 03:28:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 387. [2022-11-03 03:28:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3678756476683938) internal successors, (528), 386 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 528 transitions. [2022-11-03 03:28:28,928 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 528 transitions. Word has length 194 [2022-11-03 03:28:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:28,929 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 528 transitions. [2022-11-03 03:28:28,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 528 transitions. [2022-11-03 03:28:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:28,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:28,930 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:28,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 03:28:29,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:29,148 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1154620037, now seen corresponding path program 1 times [2022-11-03 03:28:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:29,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682014598] [2022-11-03 03:28:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:29,151 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:28:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:29,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:29,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682014598] [2022-11-03 03:28:29,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682014598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:29,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:29,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366971431] [2022-11-03 03:28:29,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:29,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:29,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:29,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:30,000 INFO L87 Difference]: Start difference. First operand 387 states and 528 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:31,106 INFO L93 Difference]: Finished difference Result 1760 states and 2512 transitions. [2022-11-03 03:28:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:31,109 INFO L225 Difference]: With dead ends: 1760 [2022-11-03 03:28:31,109 INFO L226 Difference]: Without dead ends: 1441 [2022-11-03 03:28:31,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:31,111 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 2687 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:31,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 3945 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-11-03 03:28:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 389. [2022-11-03 03:28:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.365979381443299) internal successors, (530), 388 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 530 transitions. [2022-11-03 03:28:31,126 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 530 transitions. Word has length 194 [2022-11-03 03:28:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:31,127 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 530 transitions. [2022-11-03 03:28:31,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 530 transitions. [2022-11-03 03:28:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:31,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:31,128 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:31,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:31,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:31,339 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1539276153, now seen corresponding path program 1 times [2022-11-03 03:28:31,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:31,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525357728] [2022-11-03 03:28:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:31,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:31,342 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:31,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:28:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:32,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:32,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525357728] [2022-11-03 03:28:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525357728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:32,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:32,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:32,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849199490] [2022-11-03 03:28:32,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:32,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:32,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:32,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:32,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:32,148 INFO L87 Difference]: Start difference. First operand 389 states and 530 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:33,217 INFO L93 Difference]: Finished difference Result 1770 states and 2523 transitions. [2022-11-03 03:28:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:33,220 INFO L225 Difference]: With dead ends: 1770 [2022-11-03 03:28:33,220 INFO L226 Difference]: Without dead ends: 1449 [2022-11-03 03:28:33,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:33,222 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 2690 mSDsluCounter, 3520 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 3950 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:33,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2690 Valid, 3950 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-11-03 03:28:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 391. [2022-11-03 03:28:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3641025641025641) internal successors, (532), 390 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 532 transitions. [2022-11-03 03:28:33,236 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 532 transitions. Word has length 194 [2022-11-03 03:28:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:33,236 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 532 transitions. [2022-11-03 03:28:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 532 transitions. [2022-11-03 03:28:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:33,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:33,238 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:33,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 03:28:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:33,454 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -187890935, now seen corresponding path program 1 times [2022-11-03 03:28:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:33,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261069273] [2022-11-03 03:28:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:33,456 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:33,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:28:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:34,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:34,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261069273] [2022-11-03 03:28:34,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261069273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:34,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:34,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:28:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838487616] [2022-11-03 03:28:34,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:28:34,255 INFO L87 Difference]: Start difference. First operand 391 states and 532 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:35,148 INFO L93 Difference]: Finished difference Result 1622 states and 2302 transitions. [2022-11-03 03:28:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:28:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:35,149 INFO L225 Difference]: With dead ends: 1622 [2022-11-03 03:28:35,150 INFO L226 Difference]: Without dead ends: 1299 [2022-11-03 03:28:35,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:28:35,150 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 2383 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2383 Valid, 3017 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:28:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-11-03 03:28:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 393. [2022-11-03 03:28:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.3622448979591837) internal successors, (534), 392 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 534 transitions. [2022-11-03 03:28:35,166 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 534 transitions. Word has length 194 [2022-11-03 03:28:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:35,166 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 534 transitions. [2022-11-03 03:28:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 534 transitions. [2022-11-03 03:28:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:35,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:35,168 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:35,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 03:28:35,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:35,383 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1071399925, now seen corresponding path program 1 times [2022-11-03 03:28:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:35,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765673771] [2022-11-03 03:28:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:35,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:35,385 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:35,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:28:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:35,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:36,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:36,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765673771] [2022-11-03 03:28:36,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765673771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:36,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:36,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:36,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960444846] [2022-11-03 03:28:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:36,197 INFO L87 Difference]: Start difference. First operand 393 states and 534 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:37,268 INFO L93 Difference]: Finished difference Result 1768 states and 2516 transitions. [2022-11-03 03:28:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:37,270 INFO L225 Difference]: With dead ends: 1768 [2022-11-03 03:28:37,270 INFO L226 Difference]: Without dead ends: 1443 [2022-11-03 03:28:37,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:37,272 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2684 mSDsluCounter, 3506 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 3950 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:37,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 3950 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-11-03 03:28:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 397. [2022-11-03 03:28:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.3611111111111112) internal successors, (539), 396 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 539 transitions. [2022-11-03 03:28:37,287 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 539 transitions. Word has length 194 [2022-11-03 03:28:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:37,287 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 539 transitions. [2022-11-03 03:28:37,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 539 transitions. [2022-11-03 03:28:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:37,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:37,289 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:37,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 03:28:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:37,489 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1842133491, now seen corresponding path program 1 times [2022-11-03 03:28:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238019304] [2022-11-03 03:28:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:37,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:37,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:37,492 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 03:28:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:37,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:38,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:38,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238019304] [2022-11-03 03:28:38,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238019304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:38,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:38,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688640] [2022-11-03 03:28:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:38,381 INFO L87 Difference]: Start difference. First operand 397 states and 539 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:39,479 INFO L93 Difference]: Finished difference Result 1780 states and 2530 transitions. [2022-11-03 03:28:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:39,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:39,482 INFO L225 Difference]: With dead ends: 1780 [2022-11-03 03:28:39,482 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 03:28:39,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:39,486 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 2687 mSDsluCounter, 3507 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:39,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 3955 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:28:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 03:28:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 399. [2022-11-03 03:28:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.3592964824120604) internal successors, (541), 398 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 541 transitions. [2022-11-03 03:28:39,502 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 541 transitions. Word has length 194 [2022-11-03 03:28:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:39,503 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 541 transitions. [2022-11-03 03:28:39,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 541 transitions. [2022-11-03 03:28:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:39,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:39,505 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:39,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:39,722 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1866557583, now seen corresponding path program 1 times [2022-11-03 03:28:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513910640] [2022-11-03 03:28:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:39,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:39,725 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:28:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:28:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:40,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:40,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:40,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513910640] [2022-11-03 03:28:40,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513910640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:40,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:40,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:28:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628483425] [2022-11-03 03:28:40,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:28:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:28:40,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:28:40,581 INFO L87 Difference]: Start difference. First operand 399 states and 541 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:41,687 INFO L93 Difference]: Finished difference Result 1790 states and 2541 transitions. [2022-11-03 03:28:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:28:41,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:41,689 INFO L225 Difference]: With dead ends: 1790 [2022-11-03 03:28:41,689 INFO L226 Difference]: Without dead ends: 1459 [2022-11-03 03:28:41,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:28:41,691 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 2690 mSDsluCounter, 3508 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 3960 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:41,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2690 Valid, 3960 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:28:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-03 03:28:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 401. [2022-11-03 03:28:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.3575) internal successors, (543), 400 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 543 transitions. [2022-11-03 03:28:41,708 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 543 transitions. Word has length 194 [2022-11-03 03:28:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:41,708 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 543 transitions. [2022-11-03 03:28:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 543 transitions. [2022-11-03 03:28:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:41,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:41,710 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:41,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 03:28:41,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:41,927 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -551926895, now seen corresponding path program 1 times [2022-11-03 03:28:41,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:41,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952294758] [2022-11-03 03:28:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:41,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:41,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:41,930 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:41,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 03:28:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:28:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:42,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:42,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952294758] [2022-11-03 03:28:42,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952294758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:42,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:42,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:42,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374905311] [2022-11-03 03:28:42,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:42,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:42,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:42,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:42,745 INFO L87 Difference]: Start difference. First operand 401 states and 543 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:42,951 INFO L93 Difference]: Finished difference Result 1183 states and 1642 transitions. [2022-11-03 03:28:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:28:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:42,953 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 03:28:42,953 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 03:28:42,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:42,955 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 495 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:42,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 952 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:28:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 03:28:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 445. [2022-11-03 03:28:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.3288288288288288) internal successors, (590), 444 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 590 transitions. [2022-11-03 03:28:42,970 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 590 transitions. Word has length 194 [2022-11-03 03:28:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:42,970 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 590 transitions. [2022-11-03 03:28:42,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 590 transitions. [2022-11-03 03:28:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:42,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:42,972 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:42,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:43,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:43,190 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash 772929299, now seen corresponding path program 1 times [2022-11-03 03:28:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:43,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587468826] [2022-11-03 03:28:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:43,193 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:43,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:28:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:28:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:44,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:44,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587468826] [2022-11-03 03:28:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587468826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:44,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337671110] [2022-11-03 03:28:44,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:44,049 INFO L87 Difference]: Start difference. First operand 445 states and 590 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:44,302 INFO L93 Difference]: Finished difference Result 1442 states and 2002 transitions. [2022-11-03 03:28:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:44,304 INFO L225 Difference]: With dead ends: 1442 [2022-11-03 03:28:44,304 INFO L226 Difference]: Without dead ends: 1109 [2022-11-03 03:28:44,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:44,305 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 920 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:44,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 1462 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:28:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-11-03 03:28:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 447. [2022-11-03 03:28:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3273542600896862) internal successors, (592), 446 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 592 transitions. [2022-11-03 03:28:44,317 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 592 transitions. Word has length 194 [2022-11-03 03:28:44,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:44,317 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 592 transitions. [2022-11-03 03:28:44,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 592 transitions. [2022-11-03 03:28:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:44,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:44,319 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:44,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 03:28:44,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:44,527 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash -284908779, now seen corresponding path program 1 times [2022-11-03 03:28:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303681027] [2022-11-03 03:28:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:44,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:44,529 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:44,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 03:28:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:28:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:45,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:45,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303681027] [2022-11-03 03:28:45,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303681027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:45,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:45,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739608589] [2022-11-03 03:28:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:45,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:45,340 INFO L87 Difference]: Start difference. First operand 447 states and 592 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:45,584 INFO L93 Difference]: Finished difference Result 1442 states and 2001 transitions. [2022-11-03 03:28:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:45,587 INFO L225 Difference]: With dead ends: 1442 [2022-11-03 03:28:45,587 INFO L226 Difference]: Without dead ends: 1109 [2022-11-03 03:28:45,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:45,588 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 913 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:45,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1458 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:28:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-11-03 03:28:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 449. [2022-11-03 03:28:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3258928571428572) internal successors, (594), 448 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 594 transitions. [2022-11-03 03:28:45,599 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 594 transitions. Word has length 194 [2022-11-03 03:28:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:45,599 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 594 transitions. [2022-11-03 03:28:45,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 594 transitions. [2022-11-03 03:28:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:45,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:45,601 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:45,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 03:28:45,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:45,818 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash -44669033, now seen corresponding path program 1 times [2022-11-03 03:28:45,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899207144] [2022-11-03 03:28:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:45,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:45,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:45,822 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:28:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:46,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:46,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899207144] [2022-11-03 03:28:46,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899207144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:46,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:46,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351204416] [2022-11-03 03:28:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:46,686 INFO L87 Difference]: Start difference. First operand 449 states and 594 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:46,785 INFO L93 Difference]: Finished difference Result 1183 states and 1639 transitions. [2022-11-03 03:28:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:28:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:46,788 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 03:28:46,788 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 03:28:46,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:46,789 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 472 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:46,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1015 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 03:28:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 453. [2022-11-03 03:28:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.325221238938053) internal successors, (599), 452 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 599 transitions. [2022-11-03 03:28:46,804 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 599 transitions. Word has length 194 [2022-11-03 03:28:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:46,805 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 599 transitions. [2022-11-03 03:28:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 599 transitions. [2022-11-03 03:28:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:46,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:46,807 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:46,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:47,019 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1689435417, now seen corresponding path program 1 times [2022-11-03 03:28:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066805476] [2022-11-03 03:28:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:47,022 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 03:28:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:47,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:47,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:47,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066805476] [2022-11-03 03:28:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066805476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:47,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:47,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435166968] [2022-11-03 03:28:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:47,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:47,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:47,886 INFO L87 Difference]: Start difference. First operand 453 states and 599 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:48,015 INFO L93 Difference]: Finished difference Result 1450 states and 2011 transitions. [2022-11-03 03:28:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:48,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:48,017 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:48,017 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:48,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:48,018 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 909 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:48,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1546 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 455. [2022-11-03 03:28:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.3237885462555066) internal successors, (601), 454 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 601 transitions. [2022-11-03 03:28:48,031 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 601 transitions. Word has length 194 [2022-11-03 03:28:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:48,031 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 601 transitions. [2022-11-03 03:28:48,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 601 transitions. [2022-11-03 03:28:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:48,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:48,033 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:48,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:48,251 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -221607141, now seen corresponding path program 1 times [2022-11-03 03:28:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139076181] [2022-11-03 03:28:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:48,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:48,254 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:48,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 03:28:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:49,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:49,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139076181] [2022-11-03 03:28:49,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139076181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:49,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:49,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364041381] [2022-11-03 03:28:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:49,115 INFO L87 Difference]: Start difference. First operand 455 states and 601 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:49,242 INFO L93 Difference]: Finished difference Result 1450 states and 2010 transitions. [2022-11-03 03:28:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:49,243 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:49,243 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:49,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:49,249 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 902 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:49,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1539 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 457. [2022-11-03 03:28:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.3223684210526316) internal successors, (603), 456 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 603 transitions. [2022-11-03 03:28:49,263 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 603 transitions. Word has length 194 [2022-11-03 03:28:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:49,264 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 603 transitions. [2022-11-03 03:28:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 603 transitions. [2022-11-03 03:28:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:49,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:49,265 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:49,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 03:28:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:49,484 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1188957795, now seen corresponding path program 1 times [2022-11-03 03:28:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:49,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078550732] [2022-11-03 03:28:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:49,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:49,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:49,487 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:49,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:28:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:50,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:50,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078550732] [2022-11-03 03:28:50,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078550732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:50,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:50,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169776594] [2022-11-03 03:28:50,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:50,381 INFO L87 Difference]: Start difference. First operand 457 states and 603 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:50,575 INFO L93 Difference]: Finished difference Result 1450 states and 2009 transitions. [2022-11-03 03:28:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:50,578 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:50,578 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:50,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:50,580 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 895 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:50,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1512 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 459. [2022-11-03 03:28:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.3209606986899562) internal successors, (605), 458 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 605 transitions. [2022-11-03 03:28:50,597 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 605 transitions. Word has length 194 [2022-11-03 03:28:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:50,597 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 605 transitions. [2022-11-03 03:28:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 605 transitions. [2022-11-03 03:28:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:50,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:50,599 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:50,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:50,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:50,817 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1681583969, now seen corresponding path program 1 times [2022-11-03 03:28:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:50,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811691508] [2022-11-03 03:28:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:50,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:50,820 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:50,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 03:28:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:51,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:51,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811691508] [2022-11-03 03:28:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811691508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:51,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471862656] [2022-11-03 03:28:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:51,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:51,850 INFO L87 Difference]: Start difference. First operand 459 states and 605 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:51,986 INFO L93 Difference]: Finished difference Result 1450 states and 2008 transitions. [2022-11-03 03:28:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:51,987 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:51,988 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:51,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:51,988 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 888 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:51,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1528 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 461. [2022-11-03 03:28:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.3195652173913044) internal successors, (607), 460 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 607 transitions. [2022-11-03 03:28:52,001 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 607 transitions. Word has length 194 [2022-11-03 03:28:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:52,001 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 607 transitions. [2022-11-03 03:28:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 607 transitions. [2022-11-03 03:28:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:52,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:52,003 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:52,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:52,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:52,211 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1397229601, now seen corresponding path program 1 times [2022-11-03 03:28:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140129957] [2022-11-03 03:28:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:52,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:52,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:52,213 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:52,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 03:28:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:52,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:53,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:53,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140129957] [2022-11-03 03:28:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140129957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:53,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83304418] [2022-11-03 03:28:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:53,078 INFO L87 Difference]: Start difference. First operand 461 states and 607 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:53,202 INFO L93 Difference]: Finished difference Result 1450 states and 2007 transitions. [2022-11-03 03:28:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:53,204 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:53,205 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:53,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:53,206 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 881 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:53,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1527 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 463. [2022-11-03 03:28:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.3181818181818181) internal successors, (609), 462 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 609 transitions. [2022-11-03 03:28:53,222 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 609 transitions. Word has length 194 [2022-11-03 03:28:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:53,222 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 609 transitions. [2022-11-03 03:28:53,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 609 transitions. [2022-11-03 03:28:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:53,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:53,224 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:53,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 03:28:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:53,439 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash -288950237, now seen corresponding path program 1 times [2022-11-03 03:28:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923574751] [2022-11-03 03:28:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:53,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:53,442 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:53,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 03:28:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:54,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:54,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:54,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923574751] [2022-11-03 03:28:54,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923574751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:54,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:54,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803565541] [2022-11-03 03:28:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:54,288 INFO L87 Difference]: Start difference. First operand 463 states and 609 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:54,414 INFO L93 Difference]: Finished difference Result 1450 states and 2006 transitions. [2022-11-03 03:28:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:54,415 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:28:54,415 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:28:54,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:54,416 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 874 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:54,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 1523 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:28:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 465. [2022-11-03 03:28:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.3168103448275863) internal successors, (611), 464 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 611 transitions. [2022-11-03 03:28:54,432 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 611 transitions. Word has length 194 [2022-11-03 03:28:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:54,433 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 611 transitions. [2022-11-03 03:28:54,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 611 transitions. [2022-11-03 03:28:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:54,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:54,434 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:54,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:54,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -706346843, now seen corresponding path program 1 times [2022-11-03 03:28:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911228061] [2022-11-03 03:28:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:54,654 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:54,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 03:28:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:55,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:55,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:55,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911228061] [2022-11-03 03:28:55,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911228061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:55,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:55,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:28:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858254225] [2022-11-03 03:28:55,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:55,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:28:55,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:28:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:28:55,539 INFO L87 Difference]: Start difference. First operand 465 states and 611 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:55,753 INFO L93 Difference]: Finished difference Result 1466 states and 2029 transitions. [2022-11-03 03:28:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:28:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:55,755 INFO L225 Difference]: With dead ends: 1466 [2022-11-03 03:28:55,755 INFO L226 Difference]: Without dead ends: 1133 [2022-11-03 03:28:55,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:28:55,756 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1103 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:55,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 1849 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-11-03 03:28:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 471. [2022-11-03 03:28:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.3170212765957447) internal successors, (619), 470 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 619 transitions. [2022-11-03 03:28:55,775 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 619 transitions. Word has length 194 [2022-11-03 03:28:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:55,776 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 619 transitions. [2022-11-03 03:28:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 619 transitions. [2022-11-03 03:28:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:55,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:55,778 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:55,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 03:28:55,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:55,979 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 554570407, now seen corresponding path program 1 times [2022-11-03 03:28:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:55,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729572276] [2022-11-03 03:28:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:55,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:55,982 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:55,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 03:28:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:56,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:56,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729572276] [2022-11-03 03:28:56,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729572276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:56,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:56,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:56,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180412493] [2022-11-03 03:28:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:56,888 INFO L87 Difference]: Start difference. First operand 471 states and 619 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:57,031 INFO L93 Difference]: Finished difference Result 1194 states and 1642 transitions. [2022-11-03 03:28:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:57,032 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 03:28:57,032 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:28:57,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:57,033 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 641 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:57,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 1340 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:28:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 473. [2022-11-03 03:28:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.3156779661016949) internal successors, (621), 472 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 621 transitions. [2022-11-03 03:28:57,049 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 621 transitions. Word has length 194 [2022-11-03 03:28:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:57,050 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 621 transitions. [2022-11-03 03:28:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 621 transitions. [2022-11-03 03:28:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:57,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:57,051 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:57,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 03:28:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:57,255 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1941355817, now seen corresponding path program 1 times [2022-11-03 03:28:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067720429] [2022-11-03 03:28:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:57,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:57,257 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:57,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 03:28:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:28:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:57,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:57,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:57,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067720429] [2022-11-03 03:28:57,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067720429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:57,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:57,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144858575] [2022-11-03 03:28:57,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:57,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:57,971 INFO L87 Difference]: Start difference. First operand 473 states and 621 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:58,260 INFO L93 Difference]: Finished difference Result 1194 states and 1641 transitions. [2022-11-03 03:28:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:58,262 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 03:28:58,262 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:28:58,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:58,263 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 634 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:58,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1252 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:28:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:28:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 475. [2022-11-03 03:28:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.3143459915611815) internal successors, (623), 474 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 623 transitions. [2022-11-03 03:28:58,273 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 623 transitions. Word has length 194 [2022-11-03 03:28:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:58,273 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 623 transitions. [2022-11-03 03:28:58,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 623 transitions. [2022-11-03 03:28:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:58,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:58,274 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:58,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:58,493 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1909710805, now seen corresponding path program 1 times [2022-11-03 03:28:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340864668] [2022-11-03 03:28:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:58,497 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:58,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 03:28:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:28:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:59,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:59,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:28:59,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340864668] [2022-11-03 03:28:59,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340864668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:59,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:59,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:28:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62848257] [2022-11-03 03:28:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:28:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:28:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:28:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:59,170 INFO L87 Difference]: Start difference. First operand 475 states and 623 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:59,325 INFO L93 Difference]: Finished difference Result 1194 states and 1640 transitions. [2022-11-03 03:28:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:28:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:59,327 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 03:28:59,327 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:28:59,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:28:59,327 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 627 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:59,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1315 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:28:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 477. [2022-11-03 03:28:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.3130252100840336) internal successors, (625), 476 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 625 transitions. [2022-11-03 03:28:59,342 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 625 transitions. Word has length 194 [2022-11-03 03:28:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:59,342 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 625 transitions. [2022-11-03 03:28:59,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 625 transitions. [2022-11-03 03:28:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:28:59,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:59,344 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:59,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 03:28:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:28:59,552 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash 356670381, now seen corresponding path program 1 times [2022-11-03 03:28:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:28:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118069120] [2022-11-03 03:28:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:59,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:28:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:28:59,554 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:28:59,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 03:29:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:00,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:00,447 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118069120] [2022-11-03 03:29:00,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118069120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:00,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:00,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605604656] [2022-11-03 03:29:00,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:00,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:00,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:00,449 INFO L87 Difference]: Start difference. First operand 477 states and 625 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:00,623 INFO L93 Difference]: Finished difference Result 1450 states and 2001 transitions. [2022-11-03 03:29:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:00,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:00,625 INFO L225 Difference]: With dead ends: 1450 [2022-11-03 03:29:00,625 INFO L226 Difference]: Without dead ends: 1117 [2022-11-03 03:29:00,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:00,626 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 824 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:00,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1462 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-03 03:29:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 481. [2022-11-03 03:29:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.3125) internal successors, (630), 480 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 630 transitions. [2022-11-03 03:29:00,637 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 630 transitions. Word has length 194 [2022-11-03 03:29:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:00,638 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 630 transitions. [2022-11-03 03:29:00,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 630 transitions. [2022-11-03 03:29:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:00,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:00,639 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:00,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 03:29:00,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:00,843 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 3581999, now seen corresponding path program 1 times [2022-11-03 03:29:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:00,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913987637] [2022-11-03 03:29:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:00,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:00,845 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:00,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 03:29:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:01,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:01,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:01,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913987637] [2022-11-03 03:29:01,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913987637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:01,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:01,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604921573] [2022-11-03 03:29:01,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:01,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:01,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:01,779 INFO L87 Difference]: Start difference. First operand 481 states and 630 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:02,040 INFO L93 Difference]: Finished difference Result 1480 states and 2045 transitions. [2022-11-03 03:29:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:02,042 INFO L225 Difference]: With dead ends: 1480 [2022-11-03 03:29:02,042 INFO L226 Difference]: Without dead ends: 1147 [2022-11-03 03:29:02,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:02,044 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 869 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:02,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 1445 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-03 03:29:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 485. [2022-11-03 03:29:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.31198347107438) internal successors, (635), 484 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 635 transitions. [2022-11-03 03:29:02,057 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 635 transitions. Word has length 194 [2022-11-03 03:29:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:02,058 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 635 transitions. [2022-11-03 03:29:02,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 635 transitions. [2022-11-03 03:29:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:02,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:02,059 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:02,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:02,275 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash -893811279, now seen corresponding path program 1 times [2022-11-03 03:29:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:02,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272102998] [2022-11-03 03:29:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:02,278 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:02,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 03:29:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:02,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:03,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:03,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272102998] [2022-11-03 03:29:03,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272102998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:03,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:03,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849360078] [2022-11-03 03:29:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:03,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:03,252 INFO L87 Difference]: Start difference. First operand 485 states and 635 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:03,510 INFO L93 Difference]: Finished difference Result 1480 states and 2044 transitions. [2022-11-03 03:29:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:03,511 INFO L225 Difference]: With dead ends: 1480 [2022-11-03 03:29:03,511 INFO L226 Difference]: Without dead ends: 1147 [2022-11-03 03:29:03,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:03,513 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 862 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:03,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 1441 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-03 03:29:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 487. [2022-11-03 03:29:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3106995884773662) internal successors, (637), 486 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 637 transitions. [2022-11-03 03:29:03,538 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 637 transitions. Word has length 194 [2022-11-03 03:29:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:03,539 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 637 transitions. [2022-11-03 03:29:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 637 transitions. [2022-11-03 03:29:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:03,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:03,540 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:03,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:03,755 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash -470164557, now seen corresponding path program 1 times [2022-11-03 03:29:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:03,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59141800] [2022-11-03 03:29:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:03,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:03,757 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:03,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 03:29:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:04,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:04,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:04,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59141800] [2022-11-03 03:29:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59141800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:04,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505738788] [2022-11-03 03:29:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:04,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:04,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:04,704 INFO L87 Difference]: Start difference. First operand 487 states and 637 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:04,886 INFO L93 Difference]: Finished difference Result 1480 states and 2043 transitions. [2022-11-03 03:29:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:04,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:04,887 INFO L225 Difference]: With dead ends: 1480 [2022-11-03 03:29:04,887 INFO L226 Difference]: Without dead ends: 1147 [2022-11-03 03:29:04,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:04,888 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 855 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:04,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1494 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-03 03:29:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 489. [2022-11-03 03:29:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.3094262295081966) internal successors, (639), 488 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 639 transitions. [2022-11-03 03:29:04,899 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 639 transitions. Word has length 194 [2022-11-03 03:29:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:04,900 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 639 transitions. [2022-11-03 03:29:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 639 transitions. [2022-11-03 03:29:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:04,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:04,901 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:04,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:05,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:05,102 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:05,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1979435573, now seen corresponding path program 1 times [2022-11-03 03:29:05,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108949805] [2022-11-03 03:29:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:05,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:05,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:05,104 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:05,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 03:29:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:06,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:06,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108949805] [2022-11-03 03:29:06,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108949805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:06,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:06,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:29:06,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991900845] [2022-11-03 03:29:06,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:06,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:06,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:06,031 INFO L87 Difference]: Start difference. First operand 489 states and 639 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:06,208 INFO L93 Difference]: Finished difference Result 1470 states and 2027 transitions. [2022-11-03 03:29:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:06,210 INFO L225 Difference]: With dead ends: 1470 [2022-11-03 03:29:06,210 INFO L226 Difference]: Without dead ends: 1137 [2022-11-03 03:29:06,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:29:06,211 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 1038 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:06,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 1811 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-11-03 03:29:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 491. [2022-11-03 03:29:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.3081632653061224) internal successors, (641), 490 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 641 transitions. [2022-11-03 03:29:06,230 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 641 transitions. Word has length 194 [2022-11-03 03:29:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:06,230 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 641 transitions. [2022-11-03 03:29:06,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 641 transitions. [2022-11-03 03:29:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:06,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:06,232 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:06,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:06,450 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1656000201, now seen corresponding path program 1 times [2022-11-03 03:29:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941803617] [2022-11-03 03:29:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:06,454 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:06,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 03:29:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:29:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:07,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:07,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941803617] [2022-11-03 03:29:07,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941803617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:07,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356497494] [2022-11-03 03:29:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:07,192 INFO L87 Difference]: Start difference. First operand 491 states and 641 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:07,493 INFO L93 Difference]: Finished difference Result 1194 states and 1634 transitions. [2022-11-03 03:29:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:07,495 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 03:29:07,495 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:29:07,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:07,496 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 575 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:07,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1218 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:29:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 493. [2022-11-03 03:29:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.306910569105691) internal successors, (643), 492 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 643 transitions. [2022-11-03 03:29:07,511 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 643 transitions. Word has length 194 [2022-11-03 03:29:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:07,511 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 643 transitions. [2022-11-03 03:29:07,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 643 transitions. [2022-11-03 03:29:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:07,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:07,512 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:07,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 03:29:07,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:07,713 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1794961593, now seen corresponding path program 1 times [2022-11-03 03:29:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239496432] [2022-11-03 03:29:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:07,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:07,716 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:07,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 03:29:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:08,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:08,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239496432] [2022-11-03 03:29:08,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239496432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:08,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:08,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:08,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370451232] [2022-11-03 03:29:08,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:08,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:08,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:08,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:08,387 INFO L87 Difference]: Start difference. First operand 493 states and 643 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:08,541 INFO L93 Difference]: Finished difference Result 1194 states and 1633 transitions. [2022-11-03 03:29:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:08,542 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 03:29:08,542 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 03:29:08,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:08,543 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 568 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1281 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 03:29:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 495. [2022-11-03 03:29:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.305668016194332) internal successors, (645), 494 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 645 transitions. [2022-11-03 03:29:08,556 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 645 transitions. Word has length 194 [2022-11-03 03:29:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:08,556 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 645 transitions. [2022-11-03 03:29:08,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 645 transitions. [2022-11-03 03:29:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:08,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:08,557 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:08,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 03:29:08,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:08,758 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1722575035, now seen corresponding path program 1 times [2022-11-03 03:29:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340575510] [2022-11-03 03:29:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:08,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:08,760 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:08,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 03:29:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:09,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:09,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340575510] [2022-11-03 03:29:09,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340575510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:09,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:09,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624399596] [2022-11-03 03:29:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:09,711 INFO L87 Difference]: Start difference. First operand 495 states and 645 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:09,940 INFO L93 Difference]: Finished difference Result 1488 states and 2051 transitions. [2022-11-03 03:29:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:09,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:09,943 INFO L225 Difference]: With dead ends: 1488 [2022-11-03 03:29:09,943 INFO L226 Difference]: Without dead ends: 1155 [2022-11-03 03:29:09,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:09,944 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 837 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:09,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1482 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-11-03 03:29:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 499. [2022-11-03 03:29:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3052208835341366) internal successors, (650), 498 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 650 transitions. [2022-11-03 03:29:09,965 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 650 transitions. Word has length 194 [2022-11-03 03:29:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:09,966 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 650 transitions. [2022-11-03 03:29:09,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 650 transitions. [2022-11-03 03:29:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:09,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:09,967 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:09,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:10,186 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1186188867, now seen corresponding path program 1 times [2022-11-03 03:29:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854790996] [2022-11-03 03:29:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:10,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:10,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:10,188 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 03:29:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:10,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:10,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:11,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:11,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854790996] [2022-11-03 03:29:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854790996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:11,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:11,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563886243] [2022-11-03 03:29:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:11,157 INFO L87 Difference]: Start difference. First operand 499 states and 650 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:11,294 INFO L93 Difference]: Finished difference Result 1166 states and 1595 transitions. [2022-11-03 03:29:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:11,296 INFO L225 Difference]: With dead ends: 1166 [2022-11-03 03:29:11,296 INFO L226 Difference]: Without dead ends: 833 [2022-11-03 03:29:11,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:11,296 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 308 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:11,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 949 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-03 03:29:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 501. [2022-11-03 03:29:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.304) internal successors, (652), 500 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 652 transitions. [2022-11-03 03:29:11,314 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 652 transitions. Word has length 194 [2022-11-03 03:29:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:11,315 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 652 transitions. [2022-11-03 03:29:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 652 transitions. [2022-11-03 03:29:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:11,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:11,316 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:11,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 03:29:11,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:11,517 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1185550395, now seen corresponding path program 1 times [2022-11-03 03:29:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:11,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150337627] [2022-11-03 03:29:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:11,519 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:11,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 03:29:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:12,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:12,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:12,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150337627] [2022-11-03 03:29:12,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150337627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:12,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:12,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653894430] [2022-11-03 03:29:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:12,479 INFO L87 Difference]: Start difference. First operand 501 states and 652 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:12,670 INFO L93 Difference]: Finished difference Result 1500 states and 2067 transitions. [2022-11-03 03:29:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:12,671 INFO L225 Difference]: With dead ends: 1500 [2022-11-03 03:29:12,672 INFO L226 Difference]: Without dead ends: 1167 [2022-11-03 03:29:12,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:12,672 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 836 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:12,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1488 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-11-03 03:29:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 507. [2022-11-03 03:29:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3043478260869565) internal successors, (660), 506 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 660 transitions. [2022-11-03 03:29:12,687 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 660 transitions. Word has length 194 [2022-11-03 03:29:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 660 transitions. [2022-11-03 03:29:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 660 transitions. [2022-11-03 03:29:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:12,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:12,688 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:12,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 03:29:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:12,891 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1608252221, now seen corresponding path program 1 times [2022-11-03 03:29:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807925287] [2022-11-03 03:29:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:12,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:12,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:12,893 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:12,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 03:29:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:13,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:29:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:13,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:13,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:13,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807925287] [2022-11-03 03:29:13,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807925287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:13,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:13,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:13,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290270238] [2022-11-03 03:29:13,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:13,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:13,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:13,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:13,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:13,555 INFO L87 Difference]: Start difference. First operand 507 states and 660 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:13,608 INFO L93 Difference]: Finished difference Result 1183 states and 1618 transitions. [2022-11-03 03:29:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:13,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:13,609 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 03:29:13,610 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 03:29:13,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:13,610 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 306 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:13,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 997 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 03:29:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 511. [2022-11-03 03:29:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.303921568627451) internal successors, (665), 510 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 665 transitions. [2022-11-03 03:29:13,624 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 665 transitions. Word has length 194 [2022-11-03 03:29:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 665 transitions. [2022-11-03 03:29:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 665 transitions. [2022-11-03 03:29:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:13,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:13,625 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:13,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:13,825 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash 19904319, now seen corresponding path program 1 times [2022-11-03 03:29:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:13,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11294209] [2022-11-03 03:29:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:13,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:13,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:13,828 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:13,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 03:29:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:14,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:14,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:14,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11294209] [2022-11-03 03:29:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11294209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:14,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:14,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:29:14,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451655897] [2022-11-03 03:29:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:14,750 INFO L87 Difference]: Start difference. First operand 511 states and 665 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:14,929 INFO L93 Difference]: Finished difference Result 1470 states and 2020 transitions. [2022-11-03 03:29:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:14,931 INFO L225 Difference]: With dead ends: 1470 [2022-11-03 03:29:14,931 INFO L226 Difference]: Without dead ends: 1137 [2022-11-03 03:29:14,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:29:14,932 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 962 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:14,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1738 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-11-03 03:29:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 513. [2022-11-03 03:29:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.302734375) internal successors, (667), 512 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2022-11-03 03:29:14,953 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 194 [2022-11-03 03:29:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:14,953 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2022-11-03 03:29:14,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2022-11-03 03:29:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:14,955 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:14,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:15,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:15,159 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1259959359, now seen corresponding path program 1 times [2022-11-03 03:29:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586810668] [2022-11-03 03:29:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:15,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:15,161 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:15,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 03:29:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:16,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:16,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586810668] [2022-11-03 03:29:16,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586810668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:16,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:16,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:16,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672559209] [2022-11-03 03:29:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:16,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:16,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:16,193 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:16,343 INFO L93 Difference]: Finished difference Result 1183 states and 1616 transitions. [2022-11-03 03:29:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:16,345 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 03:29:16,345 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 03:29:16,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:16,346 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 289 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:16,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 962 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 03:29:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 517. [2022-11-03 03:29:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.302325581395349) internal successors, (672), 516 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 672 transitions. [2022-11-03 03:29:16,364 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 672 transitions. Word has length 194 [2022-11-03 03:29:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:16,365 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 672 transitions. [2022-11-03 03:29:16,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 672 transitions. [2022-11-03 03:29:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:16,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:16,366 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:16,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 03:29:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:16,584 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -558894781, now seen corresponding path program 1 times [2022-11-03 03:29:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:16,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763842826] [2022-11-03 03:29:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:16,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:16,588 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:16,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:29:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 03:29:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:20,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:26,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:26,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763842826] [2022-11-03 03:29:26,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763842826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:26,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63657125] [2022-11-03 03:29:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:26,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:26,174 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:26,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 03:29:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 03:29:27,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:32,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63657125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548103465] [2022-11-03 03:29:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:32,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:32,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:32,479 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:32,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 03:29:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 03:29:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:36,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:38,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548103465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:38,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:29:38,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 40 [2022-11-03 03:29:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709484712] [2022-11-03 03:29:38,879 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:29:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:29:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:29:38,881 INFO L87 Difference]: Start difference. First operand 517 states and 672 transitions. Second operand has 40 states, 40 states have (on average 9.75) internal successors, (390), 40 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:43,876 INFO L93 Difference]: Finished difference Result 1552 states and 2130 transitions. [2022-11-03 03:29:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:29:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.75) internal successors, (390), 40 states have internal predecessors, (390), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:43,888 INFO L225 Difference]: With dead ends: 1552 [2022-11-03 03:29:43,888 INFO L226 Difference]: Without dead ends: 1550 [2022-11-03 03:29:43,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1123 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 03:29:43,890 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 3731 mSDsluCounter, 11622 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3731 SdHoareTripleChecker+Valid, 12155 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2152 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:43,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3731 Valid, 12155 Invalid, 3419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1212 Invalid, 0 Unknown, 2152 Unchecked, 1.8s Time] [2022-11-03 03:29:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-11-03 03:29:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 960. [2022-11-03 03:29:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.3201251303441084) internal successors, (1266), 959 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1266 transitions. [2022-11-03 03:29:43,935 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1266 transitions. Word has length 194 [2022-11-03 03:29:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:43,936 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1266 transitions. [2022-11-03 03:29:43,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.75) internal successors, (390), 40 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1266 transitions. [2022-11-03 03:29:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 03:29:43,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:43,938 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:43,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 03:29:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:44,546 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1420728383, now seen corresponding path program 1 times [2022-11-03 03:29:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:44,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489265102] [2022-11-03 03:29:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:44,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:44,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:44,548 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:44,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 03:29:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:29:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:45,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:45,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:45,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489265102] [2022-11-03 03:29:45,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489265102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:45,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:45,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:29:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104532420] [2022-11-03 03:29:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:29:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:29:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:45,199 INFO L87 Difference]: Start difference. First operand 960 states and 1266 transitions. Second operand has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:46,015 INFO L93 Difference]: Finished difference Result 2522 states and 3524 transitions. [2022-11-03 03:29:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:29:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-03 03:29:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:46,018 INFO L225 Difference]: With dead ends: 2522 [2022-11-03 03:29:46,018 INFO L226 Difference]: Without dead ends: 2077 [2022-11-03 03:29:46,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:29:46,019 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 2824 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2824 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:46,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2824 Valid, 2575 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:29:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-03 03:29:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 848. [2022-11-03 03:29:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 1.344746162927981) internal successors, (1139), 847 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1139 transitions. [2022-11-03 03:29:46,055 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1139 transitions. Word has length 194 [2022-11-03 03:29:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:46,055 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1139 transitions. [2022-11-03 03:29:46,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.555555555555557) internal successors, (194), 9 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1139 transitions. [2022-11-03 03:29:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:29:46,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:46,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:46,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 03:29:46,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:46,259 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash -212871383, now seen corresponding path program 1 times [2022-11-03 03:29:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:46,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417374235] [2022-11-03 03:29:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:46,262 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:46,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 03:29:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:29:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:48,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:52,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417374235] [2022-11-03 03:29:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417374235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248200068] [2022-11-03 03:29:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:52,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:29:52,769 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:29:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 03:29:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:29:53,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:53,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1248200068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:53,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:53,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:29:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973025607] [2022-11-03 03:29:53,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:53,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:53,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:29:53,976 INFO L87 Difference]: Start difference. First operand 848 states and 1139 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:54,160 INFO L93 Difference]: Finished difference Result 3058 states and 4221 transitions. [2022-11-03 03:29:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:29:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:54,164 INFO L225 Difference]: With dead ends: 3058 [2022-11-03 03:29:54,164 INFO L226 Difference]: Without dead ends: 2394 [2022-11-03 03:29:54,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:29:54,166 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 938 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:54,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1492 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-11-03 03:29:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 940. [2022-11-03 03:29:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 1.3535676251331203) internal successors, (1271), 939 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1271 transitions. [2022-11-03 03:29:54,204 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1271 transitions. Word has length 377 [2022-11-03 03:29:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:54,205 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1271 transitions. [2022-11-03 03:29:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1271 transitions. [2022-11-03 03:29:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:29:54,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:54,208 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:54,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 03:29:54,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:54,623 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1556600231, now seen corresponding path program 1 times [2022-11-03 03:29:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:54,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747562095] [2022-11-03 03:29:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:54,626 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:54,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 03:29:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:29:55,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:56,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:00,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747562095] [2022-11-03 03:30:00,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747562095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991106062] [2022-11-03 03:30:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:00,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:00,258 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 03:30:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:01,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:30:01,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:01,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991106062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:01,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:01,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:30:01,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503011605] [2022-11-03 03:30:01,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:01,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:01,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:01,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:01,433 INFO L87 Difference]: Start difference. First operand 940 states and 1271 transitions. Second operand has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:01,574 INFO L93 Difference]: Finished difference Result 3578 states and 4966 transitions. [2022-11-03 03:30:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:01,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 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 377 [2022-11-03 03:30:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:01,577 INFO L225 Difference]: With dead ends: 3578 [2022-11-03 03:30:01,577 INFO L226 Difference]: Without dead ends: 2822 [2022-11-03 03:30:01,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:30:01,578 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 947 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:01,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1585 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:30:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-11-03 03:30:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 1204. [2022-11-03 03:30:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 1.3690773067331672) internal successors, (1647), 1203 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:01,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1647 transitions. [2022-11-03 03:30:01,617 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1647 transitions. Word has length 377 [2022-11-03 03:30:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:01,618 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1647 transitions. [2022-11-03 03:30:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1647 transitions. [2022-11-03 03:30:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:30:01,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:01,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:01,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 03:30:01,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:02,038 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1712580773, now seen corresponding path program 1 times [2022-11-03 03:30:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:02,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634698717] [2022-11-03 03:30:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:02,041 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:02,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 03:30:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:30:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:04,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:07,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634698717] [2022-11-03 03:30:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634698717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [217564721] [2022-11-03 03:30:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:07,534 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:07,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 03:30:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:30:08,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [217564721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:08,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:30:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965151768] [2022-11-03 03:30:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:08,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:08,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:08,730 INFO L87 Difference]: Start difference. First operand 1204 states and 1647 transitions. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:08,882 INFO L93 Difference]: Finished difference Result 4848 states and 6771 transitions. [2022-11-03 03:30:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 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 377 [2022-11-03 03:30:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:08,888 INFO L225 Difference]: With dead ends: 4848 [2022-11-03 03:30:08,888 INFO L226 Difference]: Without dead ends: 3828 [2022-11-03 03:30:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:30:08,890 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 940 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:08,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1586 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:30:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-11-03 03:30:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 1716. [2022-11-03 03:30:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 1.3848396501457727) internal successors, (2375), 1715 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2375 transitions. [2022-11-03 03:30:08,938 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2375 transitions. Word has length 377 [2022-11-03 03:30:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:08,938 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2375 transitions. [2022-11-03 03:30:08,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2375 transitions. [2022-11-03 03:30:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:30:08,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:08,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:08,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:09,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 03:30:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:09,349 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash -75289049, now seen corresponding path program 1 times [2022-11-03 03:30:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:09,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916123644] [2022-11-03 03:30:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:09,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:09,352 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:09,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 03:30:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:30:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:14,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916123644] [2022-11-03 03:30:14,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916123644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212552324] [2022-11-03 03:30:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:14,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:14,815 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:14,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 03:30:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 03:30:15,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:15,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212552324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:15,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:15,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:30:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849671988] [2022-11-03 03:30:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:15,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:15,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:15,979 INFO L87 Difference]: Start difference. First operand 1716 states and 2375 transitions. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:16,086 INFO L93 Difference]: Finished difference Result 6344 states and 8936 transitions. [2022-11-03 03:30:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 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 377 [2022-11-03 03:30:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:16,092 INFO L225 Difference]: With dead ends: 6344 [2022-11-03 03:30:16,092 INFO L226 Difference]: Without dead ends: 4812 [2022-11-03 03:30:16,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 1119 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:30:16,094 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1597 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:16,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 1443 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:30:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2022-11-03 03:30:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 1720. [2022-11-03 03:30:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 1.3839441535776615) internal successors, (2379), 1719 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2379 transitions. [2022-11-03 03:30:16,145 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2379 transitions. Word has length 377 [2022-11-03 03:30:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:16,146 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 2379 transitions. [2022-11-03 03:30:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2379 transitions. [2022-11-03 03:30:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:30:16,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:16,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:16,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:16,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 03:30:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:16,556 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -972682327, now seen corresponding path program 1 times [2022-11-03 03:30:16,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:16,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032620849] [2022-11-03 03:30:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:16,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:16,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:16,559 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 03:30:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:30:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:18,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 185 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:30:22,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032620849] [2022-11-03 03:30:22,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032620849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829641163] [2022-11-03 03:30:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:22,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:22,095 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 03:30:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:30:23,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 137 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:24,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 137 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:30:26,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829641163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:26,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169121057] [2022-11-03 03:30:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:26,588 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:26,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 03:30:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:30:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:30:28,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:30:29,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169121057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:29,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:30:29,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17, 17, 6, 6] total 45 [2022-11-03 03:30:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185858538] [2022-11-03 03:30:29,830 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 03:30:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 03:30:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:30:29,832 INFO L87 Difference]: Start difference. First operand 1720 states and 2379 transitions. Second operand has 45 states, 45 states have (on average 33.82222222222222) internal successors, (1522), 45 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:09,316 INFO L93 Difference]: Finished difference Result 53728 states and 76067 transitions. [2022-11-03 03:32:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 474 states. [2022-11-03 03:32:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 33.82222222222222) internal successors, (1522), 45 states have internal predecessors, (1522), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:09,358 INFO L225 Difference]: With dead ends: 53728 [2022-11-03 03:32:09,358 INFO L226 Difference]: Without dead ends: 52192 [2022-11-03 03:32:09,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2823 GetRequests, 2215 SyntacticMatches, 93 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132981 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=31345, Invalid=235427, Unknown=0, NotChecked=0, Total=266772 [2022-11-03 03:32:09,388 INFO L413 NwaCegarLoop]: 1453 mSDtfsCounter, 52778 mSDsluCounter, 33216 mSDsCounter, 0 mSdLazyCounter, 5745 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52778 SdHoareTripleChecker+Valid, 34669 SdHoareTripleChecker+Invalid, 17914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 5745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11431 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:09,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52778 Valid, 34669 Invalid, 17914 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [738 Valid, 5745 Invalid, 0 Unknown, 11431 Unchecked, 7.9s Time] [2022-11-03 03:32:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52192 states. [2022-11-03 03:32:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52192 to 5408. [2022-11-03 03:32:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5407 states have (on average 1.412058442759386) internal successors, (7635), 5407 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 7635 transitions. [2022-11-03 03:32:09,754 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 7635 transitions. Word has length 377 [2022-11-03 03:32:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:09,755 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 7635 transitions. [2022-11-03 03:32:09,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 33.82222222222222) internal successors, (1522), 45 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 7635 transitions. [2022-11-03 03:32:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:09,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:09,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:09,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:10,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-03 03:32:10,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 03:32:10,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:10,380 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1174276433, now seen corresponding path program 1 times [2022-11-03 03:32:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814352970] [2022-11-03 03:32:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:10,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:10,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:10,385 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:10,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 03:32:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:12,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:13,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814352970] [2022-11-03 03:32:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814352970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [278971158] [2022-11-03 03:32:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:13,252 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 03:32:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:14,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:14,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [278971158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:14,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:14,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378207076] [2022-11-03 03:32:14,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:14,504 INFO L87 Difference]: Start difference. First operand 5408 states and 7635 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:14,795 INFO L93 Difference]: Finished difference Result 15446 states and 21795 transitions. [2022-11-03 03:32:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:14,809 INFO L225 Difference]: With dead ends: 15446 [2022-11-03 03:32:14,810 INFO L226 Difference]: Without dead ends: 10222 [2022-11-03 03:32:14,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:14,816 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1327 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:14,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 1081 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10222 states. [2022-11-03 03:32:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10222 to 5408. [2022-11-03 03:32:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5407 states have (on average 1.4002219345293139) internal successors, (7571), 5407 states have internal predecessors, (7571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 7571 transitions. [2022-11-03 03:32:14,939 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 7571 transitions. Word has length 377 [2022-11-03 03:32:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:14,939 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 7571 transitions. [2022-11-03 03:32:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 7571 transitions. [2022-11-03 03:32:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:14,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:14,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:14,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:15,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 03:32:15,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:15,343 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1084216143, now seen corresponding path program 1 times [2022-11-03 03:32:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844358086] [2022-11-03 03:32:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:15,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:15,346 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 03:32:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:16,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:17,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:17,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844358086] [2022-11-03 03:32:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844358086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990506456] [2022-11-03 03:32:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:17,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:17,835 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:17,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 03:32:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:19,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:19,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990506456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:19,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:19,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:19,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860459562] [2022-11-03 03:32:19,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:19,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:19,054 INFO L87 Difference]: Start difference. First operand 5408 states and 7571 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:19,318 INFO L93 Difference]: Finished difference Result 16122 states and 22597 transitions. [2022-11-03 03:32:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:19,330 INFO L225 Difference]: With dead ends: 16122 [2022-11-03 03:32:19,330 INFO L226 Difference]: Without dead ends: 10898 [2022-11-03 03:32:19,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:19,334 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 1329 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:19,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 1078 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10898 states. [2022-11-03 03:32:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10898 to 5408. [2022-11-03 03:32:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5407 states have (on average 1.3883854262992417) internal successors, (7507), 5407 states have internal predecessors, (7507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 7507 transitions. [2022-11-03 03:32:19,436 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 7507 transitions. Word has length 377 [2022-11-03 03:32:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:19,437 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 7507 transitions. [2022-11-03 03:32:19,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 7507 transitions. [2022-11-03 03:32:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:19,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:19,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:19,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 03:32:19,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-03 03:32:19,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:19,841 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash -585659341, now seen corresponding path program 1 times [2022-11-03 03:32:19,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:19,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096053683] [2022-11-03 03:32:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:19,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:19,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:19,845 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:19,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 03:32:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:22,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096053683] [2022-11-03 03:32:22,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096053683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708294177] [2022-11-03 03:32:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:22,381 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:22,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-03 03:32:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:23,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:23,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:23,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708294177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:23,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:23,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892000247] [2022-11-03 03:32:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:23,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:23,586 INFO L87 Difference]: Start difference. First operand 5408 states and 7507 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:23,830 INFO L93 Difference]: Finished difference Result 17594 states and 24485 transitions. [2022-11-03 03:32:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:23,841 INFO L225 Difference]: With dead ends: 17594 [2022-11-03 03:32:23,842 INFO L226 Difference]: Without dead ends: 12370 [2022-11-03 03:32:23,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:23,846 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1341 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:23,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 1072 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12370 states. [2022-11-03 03:32:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12370 to 5984. [2022-11-03 03:32:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5984 states, 5983 states have (on average 1.3750626775864951) internal successors, (8227), 5983 states have internal predecessors, (8227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5984 states to 5984 states and 8227 transitions. [2022-11-03 03:32:23,955 INFO L78 Accepts]: Start accepts. Automaton has 5984 states and 8227 transitions. Word has length 377 [2022-11-03 03:32:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:23,955 INFO L495 AbstractCegarLoop]: Abstraction has 5984 states and 8227 transitions. [2022-11-03 03:32:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5984 states and 8227 transitions. [2022-11-03 03:32:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:23,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:23,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:23,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:24,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2022-11-03 03:32:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:24,359 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1311320117, now seen corresponding path program 1 times [2022-11-03 03:32:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897895278] [2022-11-03 03:32:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:24,362 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 03:32:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:26,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:27,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897895278] [2022-11-03 03:32:27,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897895278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622257938] [2022-11-03 03:32:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:27,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:27,156 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:27,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 03:32:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:28,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:28,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622257938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:28,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:28,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955626019] [2022-11-03 03:32:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:28,574 INFO L87 Difference]: Start difference. First operand 5984 states and 8227 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:28,861 INFO L93 Difference]: Finished difference Result 18980 states and 26181 transitions. [2022-11-03 03:32:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:28,879 INFO L225 Difference]: With dead ends: 18980 [2022-11-03 03:32:28,879 INFO L226 Difference]: Without dead ends: 13180 [2022-11-03 03:32:28,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:28,887 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1345 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:28,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 1069 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13180 states. [2022-11-03 03:32:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13180 to 6368. [2022-11-03 03:32:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 1.3706612219255536) internal successors, (8727), 6367 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 8727 transitions. [2022-11-03 03:32:29,047 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 8727 transitions. Word has length 377 [2022-11-03 03:32:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:29,047 INFO L495 AbstractCegarLoop]: Abstraction has 6368 states and 8727 transitions. [2022-11-03 03:32:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 8727 transitions. [2022-11-03 03:32:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:29,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:29,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:29,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 03:32:29,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-03 03:32:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:29,451 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1584693577, now seen corresponding path program 1 times [2022-11-03 03:32:29,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:29,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695499660] [2022-11-03 03:32:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:29,455 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:29,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 03:32:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:31,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:32,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:32,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695499660] [2022-11-03 03:32:32,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695499660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877366652] [2022-11-03 03:32:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:32,443 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:32,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 03:32:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:33,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:33,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877366652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:33,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:33,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223600193] [2022-11-03 03:32:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:33,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:33,711 INFO L87 Difference]: Start difference. First operand 6368 states and 8727 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:33,981 INFO L93 Difference]: Finished difference Result 19532 states and 26877 transitions. [2022-11-03 03:32:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:33,999 INFO L225 Difference]: With dead ends: 19532 [2022-11-03 03:32:33,999 INFO L226 Difference]: Without dead ends: 13348 [2022-11-03 03:32:34,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:34,008 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1347 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:34,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1347 Valid, 1066 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2022-11-03 03:32:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 6464. [2022-11-03 03:32:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6464 states, 6463 states have (on average 1.3682500386817267) internal successors, (8843), 6463 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 8843 transitions. [2022-11-03 03:32:34,204 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 8843 transitions. Word has length 377 [2022-11-03 03:32:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:34,204 INFO L495 AbstractCegarLoop]: Abstraction has 6464 states and 8843 transitions. [2022-11-03 03:32:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 8843 transitions. [2022-11-03 03:32:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:34,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:34,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:34,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:34,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 03:32:34,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:34,619 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1762221753, now seen corresponding path program 1 times [2022-11-03 03:32:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:34,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477334635] [2022-11-03 03:32:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:34,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:34,622 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:34,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 03:32:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:36,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:37,531 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:37,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477334635] [2022-11-03 03:32:37,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477334635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:37,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106161569] [2022-11-03 03:32:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:37,532 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:37,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 03:32:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:38,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:38,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106161569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:38,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:38,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758900266] [2022-11-03 03:32:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:38,975 INFO L87 Difference]: Start difference. First operand 6464 states and 8843 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:39,234 INFO L93 Difference]: Finished difference Result 20470 states and 28091 transitions. [2022-11-03 03:32:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:39,243 INFO L225 Difference]: With dead ends: 20470 [2022-11-03 03:32:39,243 INFO L226 Difference]: Without dead ends: 14190 [2022-11-03 03:32:39,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:39,248 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1418 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 1032 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states. [2022-11-03 03:32:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14190 to 7036. [2022-11-03 03:32:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 1.3661691542288557) internal successors, (9611), 7035 states have internal predecessors, (9611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 9611 transitions. [2022-11-03 03:32:39,368 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 9611 transitions. Word has length 377 [2022-11-03 03:32:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:39,369 INFO L495 AbstractCegarLoop]: Abstraction has 7036 states and 9611 transitions. [2022-11-03 03:32:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 9611 transitions. [2022-11-03 03:32:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:39,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:39,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:39,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 03:32:39,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2022-11-03 03:32:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:39,773 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash -266364357, now seen corresponding path program 1 times [2022-11-03 03:32:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742576085] [2022-11-03 03:32:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:39,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:39,776 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:39,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 03:32:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:41,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:42,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:42,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742576085] [2022-11-03 03:32:42,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742576085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:42,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014512583] [2022-11-03 03:32:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:42,518 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:42,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 03:32:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:32:43,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:43,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014512583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:43,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:43,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 03:32:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342836595] [2022-11-03 03:32:43,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:32:43,896 INFO L87 Difference]: Start difference. First operand 7036 states and 9611 transitions. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:44,143 INFO L93 Difference]: Finished difference Result 21162 states and 29021 transitions. [2022-11-03 03:32:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 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 377 [2022-11-03 03:32:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:44,153 INFO L225 Difference]: With dead ends: 21162 [2022-11-03 03:32:44,154 INFO L226 Difference]: Without dead ends: 14310 [2022-11-03 03:32:44,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:44,160 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1431 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:44,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 1025 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14310 states. [2022-11-03 03:32:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14310 to 7156. [2022-11-03 03:32:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7156 states, 7155 states have (on average 1.3667365478686233) internal successors, (9779), 7155 states have internal predecessors, (9779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7156 states to 7156 states and 9779 transitions. [2022-11-03 03:32:44,285 INFO L78 Accepts]: Start accepts. Automaton has 7156 states and 9779 transitions. Word has length 377 [2022-11-03 03:32:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:44,285 INFO L495 AbstractCegarLoop]: Abstraction has 7156 states and 9779 transitions. [2022-11-03 03:32:44,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7156 states and 9779 transitions. [2022-11-03 03:32:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:32:44,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:44,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:44,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 03:32:44,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:44,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:44,690 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -338750915, now seen corresponding path program 1 times [2022-11-03 03:32:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265894223] [2022-11-03 03:32:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:44,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:44,693 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:44,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 03:32:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:32:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 183 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:47,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265894223] [2022-11-03 03:32:47,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265894223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060880608] [2022-11-03 03:32:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:47,261 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:47,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-03 03:32:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:48,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:32:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 127 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:32:50,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 127 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:32:55,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060880608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986719146] [2022-11-03 03:32:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:55,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:55,565 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:55,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-03 03:32:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:32:56,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 77 proven. 5 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:32:57,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 77 proven. 5 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:32:59,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986719146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:59,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:32:59,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 19, 19, 6, 6] total 52 [2022-11-03 03:32:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790929684] [2022-11-03 03:32:59,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 03:32:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 03:32:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 03:32:59,496 INFO L87 Difference]: Start difference. First operand 7156 states and 9779 transitions. Second operand has 52 states, 52 states have (on average 29.384615384615383) internal successors, (1528), 52 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:41,735 INFO L93 Difference]: Finished difference Result 161059 states and 222287 transitions. [2022-11-03 03:33:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-11-03 03:33:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 29.384615384615383) internal successors, (1528), 52 states have internal predecessors, (1528), 0 states have call successors, (0), 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 377 [2022-11-03 03:33:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:41,850 INFO L225 Difference]: With dead ends: 161059 [2022-11-03 03:33:41,850 INFO L226 Difference]: Without dead ends: 154087 [2022-11-03 03:33:41,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2512 GetRequests, 2208 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 31350 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=8925, Invalid=84405, Unknown=0, NotChecked=0, Total=93330 [2022-11-03 03:33:41,875 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 11747 mSDsluCounter, 91787 mSDsCounter, 0 mSdLazyCounter, 5882 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11747 SdHoareTripleChecker+Valid, 95144 SdHoareTripleChecker+Invalid, 25503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19548 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:41,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11747 Valid, 95144 Invalid, 25503 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [73 Valid, 5882 Invalid, 0 Unknown, 19548 Unchecked, 6.5s Time] [2022-11-03 03:33:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154087 states. [2022-11-03 03:33:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154087 to 22259. [2022-11-03 03:33:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22259 states, 22258 states have (on average 1.382199658549735) internal successors, (30765), 22258 states have internal predecessors, (30765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22259 states to 22259 states and 30765 transitions. [2022-11-03 03:33:43,530 INFO L78 Accepts]: Start accepts. Automaton has 22259 states and 30765 transitions. Word has length 377 [2022-11-03 03:33:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:43,530 INFO L495 AbstractCegarLoop]: Abstraction has 22259 states and 30765 transitions. [2022-11-03 03:33:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 29.384615384615383) internal successors, (1528), 52 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22259 states and 30765 transitions. [2022-11-03 03:33:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:33:43,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:43,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:43,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-11-03 03:33:43,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:43,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-11-03 03:33:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:44,140 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 293047489, now seen corresponding path program 1 times [2022-11-03 03:33:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333616371] [2022-11-03 03:33:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:44,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:44,144 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:44,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 03:33:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:33:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 173 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:46,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 173 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:46,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333616371] [2022-11-03 03:33:46,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333616371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557527918] [2022-11-03 03:33:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:46,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:46,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:46,802 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:46,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 03:33:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:33:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 133 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:33:49,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 133 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:33:51,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557527918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831286433] [2022-11-03 03:33:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:51,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:51,633 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:51,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 03:33:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:33:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 75 proven. 7 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:33:53,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 75 proven. 7 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:33:55,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831286433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:55,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:33:55,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 17, 17, 6, 6] total 47 [2022-11-03 03:33:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660417171] [2022-11-03 03:33:55,058 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 03:33:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 03:33:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2039, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:33:55,062 INFO L87 Difference]: Start difference. First operand 22259 states and 30765 transitions. Second operand has 47 states, 47 states have (on average 32.48936170212766) internal successors, (1527), 47 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:49,635 INFO L93 Difference]: Finished difference Result 427426 states and 590042 transitions. [2022-11-03 03:34:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2022-11-03 03:34:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 32.48936170212766) internal successors, (1527), 47 states have internal predecessors, (1527), 0 states have call successors, (0), 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 377 [2022-11-03 03:34:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:50,129 INFO L225 Difference]: With dead ends: 427426 [2022-11-03 03:34:50,130 INFO L226 Difference]: Without dead ends: 405974 [2022-11-03 03:34:50,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2661 GetRequests, 2215 SyntacticMatches, 37 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73278 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=17201, Invalid=151309, Unknown=0, NotChecked=0, Total=168510 [2022-11-03 03:34:50,183 INFO L413 NwaCegarLoop]: 2599 mSDtfsCounter, 24674 mSDsluCounter, 64565 mSDsCounter, 0 mSdLazyCounter, 7610 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24674 SdHoareTripleChecker+Valid, 67164 SdHoareTripleChecker+Invalid, 18922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 7610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11095 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:50,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24674 Valid, 67164 Invalid, 18922 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [217 Valid, 7610 Invalid, 0 Unknown, 11095 Unchecked, 7.8s Time] [2022-11-03 03:34:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405974 states. [2022-11-03 03:34:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405974 to 25249. [2022-11-03 03:34:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25249 states, 25248 states have (on average 1.3830798479087452) internal successors, (34920), 25248 states have internal predecessors, (34920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25249 states to 25249 states and 34920 transitions. [2022-11-03 03:34:52,840 INFO L78 Accepts]: Start accepts. Automaton has 25249 states and 34920 transitions. Word has length 377 [2022-11-03 03:34:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 25249 states and 34920 transitions. [2022-11-03 03:34:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 32.48936170212766) internal successors, (1527), 47 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 25249 states and 34920 transitions. [2022-11-03 03:34:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:34:52,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:52,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:52,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-03 03:34:53,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-03 03:34:53,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-03 03:34:53,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:53,447 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:53,447 INFO L85 PathProgramCache]: Analyzing trace with hash -199938485, now seen corresponding path program 1 times [2022-11-03 03:34:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733973730] [2022-11-03 03:34:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:53,450 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:53,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 03:34:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:34:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 167 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:55,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 167 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:56,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733973730] [2022-11-03 03:34:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733973730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224658640] [2022-11-03 03:34:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:56,277 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:56,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 03:34:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:34:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 127 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:34:59,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 127 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:35:00,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224658640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:00,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262044683] [2022-11-03 03:35:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:00,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:00,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:00,551 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:00,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-03 03:35:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:35:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:35:02,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:35:04,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262044683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:04,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:04,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 6, 6] total 35 [2022-11-03 03:35:04,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391273866] [2022-11-03 03:35:04,059 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:04,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:35:04,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:35:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:35:04,061 INFO L87 Difference]: Start difference. First operand 25249 states and 34920 transitions. Second operand has 35 states, 35 states have (on average 42.82857142857143) internal successors, (1499), 35 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:34,406 INFO L93 Difference]: Finished difference Result 632381 states and 868313 transitions. [2022-11-03 03:35:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2022-11-03 03:35:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 42.82857142857143) internal successors, (1499), 35 states have internal predecessors, (1499), 0 states have call successors, (0), 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 377 [2022-11-03 03:35:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:34,943 INFO L225 Difference]: With dead ends: 632381 [2022-11-03 03:35:34,943 INFO L226 Difference]: Without dead ends: 607603 [2022-11-03 03:35:35,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2536 GetRequests, 2231 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37467 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=11049, Invalid=82893, Unknown=0, NotChecked=0, Total=93942 [2022-11-03 03:35:35,077 INFO L413 NwaCegarLoop]: 1646 mSDtfsCounter, 17264 mSDsluCounter, 44112 mSDsCounter, 0 mSdLazyCounter, 4640 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17264 SdHoareTripleChecker+Valid, 45758 SdHoareTripleChecker+Invalid, 16039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 4640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11216 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:35,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17264 Valid, 45758 Invalid, 16039 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [183 Valid, 4640 Invalid, 0 Unknown, 11216 Unchecked, 5.4s Time] [2022-11-03 03:35:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607603 states. [2022-11-03 03:35:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607603 to 31776. [2022-11-03 03:35:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31776 states, 31775 states have (on average 1.3815892997639654) internal successors, (43900), 31775 states have internal predecessors, (43900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31776 states to 31776 states and 43900 transitions. [2022-11-03 03:35:39,234 INFO L78 Accepts]: Start accepts. Automaton has 31776 states and 43900 transitions. Word has length 377 [2022-11-03 03:35:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:39,234 INFO L495 AbstractCegarLoop]: Abstraction has 31776 states and 43900 transitions. [2022-11-03 03:35:39,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 42.82857142857143) internal successors, (1499), 35 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31776 states and 43900 transitions. [2022-11-03 03:35:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-11-03 03:35:39,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:39,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:39,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-03 03:35:39,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:39,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-11-03 03:35:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:39,840 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash 475824081, now seen corresponding path program 1 times [2022-11-03 03:35:39,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:39,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448559814] [2022-11-03 03:35:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:39,843 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:39,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 03:35:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:35:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 159 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 159 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:42,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448559814] [2022-11-03 03:35:42,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448559814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247500962] [2022-11-03 03:35:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:42,637 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:42,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 03:35:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:35:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 125 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:35:45,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 125 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:35:46,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1247500962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304621459] [2022-11-03 03:35:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:46,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:46,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:46,469 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:46,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-03 03:35:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:35:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 71 proven. 11 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:35:48,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 71 proven. 11 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:35:49,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304621459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:49,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:49,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 6, 6] total 35 [2022-11-03 03:35:49,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582822656] [2022-11-03 03:35:49,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:35:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:35:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:35:49,746 INFO L87 Difference]: Start difference. First operand 31776 states and 43900 transitions. Second operand has 35 states, 35 states have (on average 43.05714285714286) internal successors, (1507), 35 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:05,799 INFO L93 Difference]: Finished difference Result 340240 states and 469055 transitions. [2022-11-03 03:36:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-03 03:36:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 43.05714285714286) internal successors, (1507), 35 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2022-11-03 03:36:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:06,052 INFO L225 Difference]: With dead ends: 340240 [2022-11-03 03:36:06,052 INFO L226 Difference]: Without dead ends: 309419 [2022-11-03 03:36:06,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2401 GetRequests, 2226 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10328 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4047, Invalid=27105, Unknown=0, NotChecked=0, Total=31152 [2022-11-03 03:36:06,094 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 22637 mSDsluCounter, 16792 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22637 SdHoareTripleChecker+Valid, 17702 SdHoareTripleChecker+Invalid, 7708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4863 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:06,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22637 Valid, 17702 Invalid, 7708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [342 Valid, 2503 Invalid, 0 Unknown, 4863 Unchecked, 3.1s Time] [2022-11-03 03:36:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309419 states. [2022-11-03 03:36:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309419 to 27227. [2022-11-03 03:36:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27227 states, 27226 states have (on average 1.379894218761478) internal successors, (37569), 27226 states have internal predecessors, (37569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27227 states to 27227 states and 37569 transitions. [2022-11-03 03:36:08,133 INFO L78 Accepts]: Start accepts. Automaton has 27227 states and 37569 transitions. Word has length 377 [2022-11-03 03:36:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:08,133 INFO L495 AbstractCegarLoop]: Abstraction has 27227 states and 37569 transitions. [2022-11-03 03:36:08,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 43.05714285714286) internal successors, (1507), 35 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27227 states and 37569 transitions. [2022-11-03 03:36:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-11-03 03:36:08,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:08,144 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:08,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-03 03:36:08,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 03:36:08,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-03 03:36:08,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:08,744 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2069935277, now seen corresponding path program 1 times [2022-11-03 03:36:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060612830] [2022-11-03 03:36:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:08,750 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:08,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 03:36:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:36:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 382 proven. 50 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-03 03:36:10,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 382 proven. 50 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-03 03:36:11,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:36:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060612830] [2022-11-03 03:36:11,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060612830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825410415] [2022-11-03 03:36:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:11,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:36:11,637 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:36:11,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 03:36:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:36:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 382 proven. 176 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:36:14,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 545 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:36:15,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825410415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:15,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702104486] [2022-11-03 03:36:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:15,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:15,726 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:15,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40fc25e7-b12b-47ca-a7a8-cea5896db8f7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-03 03:36:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:36:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 382 proven. 13 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-03 03:36:17,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 382 proven. 13 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-03 03:36:19,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702104486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:19,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:36:19,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 27 [2022-11-03 03:36:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772481967] [2022-11-03 03:36:19,728 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:36:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:36:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:36:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:36:19,732 INFO L87 Difference]: Start difference. First operand 27227 states and 37569 transitions. Second operand has 27 states, 27 states have (on average 59.74074074074074) internal successors, (1613), 27 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:36:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:57,669 INFO L93 Difference]: Finished difference Result 1216281 states and 1673636 transitions. [2022-11-03 03:36:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-11-03 03:36:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 59.74074074074074) internal successors, (1613), 27 states have internal predecessors, (1613), 0 states have call successors, (0), 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 560 [2022-11-03 03:36:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:58,856 INFO L225 Difference]: With dead ends: 1216281 [2022-11-03 03:36:58,856 INFO L226 Difference]: Without dead ends: 1189693 [2022-11-03 03:36:59,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3589 GetRequests, 3344 SyntacticMatches, 1 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23555 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=8386, Invalid=51884, Unknown=0, NotChecked=0, Total=60270 [2022-11-03 03:36:59,069 INFO L413 NwaCegarLoop]: 6436 mSDtfsCounter, 8863 mSDsluCounter, 112558 mSDsCounter, 0 mSdLazyCounter, 10533 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8863 SdHoareTripleChecker+Valid, 118994 SdHoareTripleChecker+Invalid, 15882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 10533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5289 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8863 Valid, 118994 Invalid, 15882 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [60 Valid, 10533 Invalid, 0 Unknown, 5289 Unchecked, 11.8s Time] [2022-11-03 03:36:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189693 states.