./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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 5cac0223dd723d5cf2812b282c3448409c51f83effd590c85b50f84f0401207a --- 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 01:57:47,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:47,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:47,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:47,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:47,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:47,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:47,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:47,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:47,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:47,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:47,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:47,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:47,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:47,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:47,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:47,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:47,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:47,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:47,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:47,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:47,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:47,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:47,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:47,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:47,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:47,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:47,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:47,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:47,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:47,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:47,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:47,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:47,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:47,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:47,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:47,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:47,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:47,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:47,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:47,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:47,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:57:47,763 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:47,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:47,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:47,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:47,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:47,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:47,772 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:47,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:47,773 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:47,773 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:57:47,774 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:47,774 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:47,774 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:57:47,775 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:57:47,775 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:47,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:57:47,775 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:57:47,775 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:57:47,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:47,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:57:47,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:47,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:47,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:47,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:47,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:47,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:47,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:47,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:47,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:47,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:47,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:47,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:57:47,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:47,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:47,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:57:47,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:57:47,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:47,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:47,781 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0223dd723d5cf2812b282c3448409c51f83effd590c85b50f84f0401207a [2022-11-03 01:57:48,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:48,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:48,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:48,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:48,100 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:48,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:57:48,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/259fb16a5/3318186541cf47bc8bafa7225c379db6/FLAGef3b861e0 [2022-11-03 01:57:48,845 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:48,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:57:48,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/259fb16a5/3318186541cf47bc8bafa7225c379db6/FLAGef3b861e0 [2022-11-03 01:57:49,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/259fb16a5/3318186541cf47bc8bafa7225c379db6 [2022-11-03 01:57:49,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:49,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:49,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:49,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:49,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:49,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:49" (1/1) ... [2022-11-03 01:57:49,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452f418d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:49, skipping insertion in model container [2022-11-03 01:57:49,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:49" (1/1) ... [2022-11-03 01:57:49,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:49,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:49,359 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c[1107,1120] [2022-11-03 01:57:49,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:49,796 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:49,811 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c[1107,1120] [2022-11-03 01:57:50,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:50,028 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:50,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50 WrapperNode [2022-11-03 01:57:50,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:50,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:50,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:50,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:50,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,299 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2316 [2022-11-03 01:57:50,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:50,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:50,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:50,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:50,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:50,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:50,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:50,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:50,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (1/1) ... [2022-11-03 01:57:50,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:50,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:50,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:50,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:51,140 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:51,142 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:57,625 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:58:08,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:58:08,507 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:58:08,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:08 BoogieIcfgContainer [2022-11-03 01:58:08,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:58:08,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:58:08,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:58:08,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:58:08,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:49" (1/3) ... [2022-11-03 01:58:08,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce9d6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:08, skipping insertion in model container [2022-11-03 01:58:08,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:50" (2/3) ... [2022-11-03 01:58:08,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce9d6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:08, skipping insertion in model container [2022-11-03 01:58:08,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:08" (3/3) ... [2022-11-03 01:58:08,519 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:58:08,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:58:08,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:58:08,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:58:08,619 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;@59dea09c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:58:08,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:58:08,629 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 01:58:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:58:08,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:08,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:58:08,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:58:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445270689] [2022-11-03 01:58:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:58:09,217 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:58:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:58:09,602 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:58:09,604 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:58:09,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:58:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:58:09,612 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:58:09,616 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:58:09,660 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:58:09,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:58:09 BoogieIcfgContainer [2022-11-03 01:58:09,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:58:09,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:58:09,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:58:09,680 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:58:09,682 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:08" (3/4) ... [2022-11-03 01:58:09,686 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:58:09,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:58:09,689 INFO L158 Benchmark]: Toolchain (without parser) took 20673.22ms. Allocated memory was 113.2MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 72.8MB in the beginning and 1.1GB in the end (delta: -983.6MB). Peak memory consumption was 651.4MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,689 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:58:09,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1013.22ms. Allocated memory is still 113.2MB. Free memory was 72.6MB in the beginning and 66.5MB in the end (delta: 6.1MB). Peak memory consumption was 27.2MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,692 INFO L158 Benchmark]: Boogie Procedure Inliner took 269.34ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 66.5MB in the beginning and 79.0MB in the end (delta: -12.4MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,697 INFO L158 Benchmark]: Boogie Preprocessor took 230.33ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 60.7MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,698 INFO L158 Benchmark]: RCFGBuilder took 17978.72ms. Allocated memory was 140.5MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 60.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 782.2MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,700 INFO L158 Benchmark]: TraceAbstraction took 1165.38ms. Allocated memory is still 1.7GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 102.8MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. [2022-11-03 01:58:09,700 INFO L158 Benchmark]: Witness Printer took 6.74ms. Allocated memory is still 1.7GB. Free memory is still 1.1GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:58:09,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1013.22ms. Allocated memory is still 113.2MB. Free memory was 72.6MB in the beginning and 66.5MB in the end (delta: 6.1MB). Peak memory consumption was 27.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 269.34ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 66.5MB in the beginning and 79.0MB in the end (delta: -12.4MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 230.33ms. Allocated memory is still 140.5MB. Free memory was 79.0MB in the beginning and 60.7MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * RCFGBuilder took 17978.72ms. Allocated memory was 140.5MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 60.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 782.2MB. Max. memory is 16.1GB. * TraceAbstraction took 1165.38ms. Allocated memory is still 1.7GB. Free memory was 1.2GB in the beginning and 1.1GB in the end (delta: 102.8MB). Peak memory consumption was 102.8MB. Max. memory is 16.1GB. * Witness Printer took 6.74ms. Allocated memory is still 1.7GB. Free memory is still 1.1GB. 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 208, overapproximation of bitwiseOr at line 218, overapproximation of bitwiseAnd at line 182. 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 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 3); [L32] const SORT_9 msb_SORT_9 = (SORT_9)1 << (3 - 1); [L34] const SORT_17 mask_SORT_17 = (SORT_17)-1 >> (sizeof(SORT_17) * 8 - 2); [L35] const SORT_17 msb_SORT_17 = (SORT_17)1 << (2 - 1); [L37] const SORT_48 mask_SORT_48 = (SORT_48)-1 >> (sizeof(SORT_48) * 8 - 12); [L38] const SORT_48 msb_SORT_48 = (SORT_48)1 << (12 - 1); [L40] const SORT_85 mask_SORT_85 = (SORT_85)-1 >> (sizeof(SORT_85) * 8 - 17); [L41] const SORT_85 msb_SORT_85 = (SORT_85)1 << (17 - 1); [L43] const SORT_86 mask_SORT_86 = (SORT_86)-1 >> (sizeof(SORT_86) * 8 - 5); [L44] const SORT_86 msb_SORT_86 = (SORT_86)1 << (5 - 1); [L46] const SORT_89 mask_SORT_89 = (SORT_89)-1 >> (sizeof(SORT_89) * 8 - 9); [L47] const SORT_89 msb_SORT_89 = (SORT_89)1 << (9 - 1); [L49] const SORT_91 mask_SORT_91 = (SORT_91)-1 >> (sizeof(SORT_91) * 8 - 10); [L50] const SORT_91 msb_SORT_91 = (SORT_91)1 << (10 - 1); [L52] const SORT_94 mask_SORT_94 = (SORT_94)-1 >> (sizeof(SORT_94) * 8 - 11); [L53] const SORT_94 msb_SORT_94 = (SORT_94)1 << (11 - 1); [L55] const SORT_99 mask_SORT_99 = (SORT_99)-1 >> (sizeof(SORT_99) * 8 - 13); [L56] const SORT_99 msb_SORT_99 = (SORT_99)1 << (13 - 1); [L58] const SORT_102 mask_SORT_102 = (SORT_102)-1 >> (sizeof(SORT_102) * 8 - 14); [L59] const SORT_102 msb_SORT_102 = (SORT_102)1 << (14 - 1); [L61] const SORT_105 mask_SORT_105 = (SORT_105)-1 >> (sizeof(SORT_105) * 8 - 15); [L62] const SORT_105 msb_SORT_105 = (SORT_105)1 << (15 - 1); [L64] const SORT_138 mask_SORT_138 = (SORT_138)-1 >> (sizeof(SORT_138) * 8 - 7); [L65] const SORT_138 msb_SORT_138 = (SORT_138)1 << (7 - 1); [L67] const SORT_371 mask_SORT_371 = (SORT_371)-1 >> (sizeof(SORT_371) * 8 - 4); [L68] const SORT_371 msb_SORT_371 = (SORT_371)1 << (4 - 1); [L70] const SORT_374 mask_SORT_374 = (SORT_374)-1 >> (sizeof(SORT_374) * 8 - 6); [L71] const SORT_374 msb_SORT_374 = (SORT_374)1 << (6 - 1); [L73] const SORT_377 mask_SORT_377 = (SORT_377)-1 >> (sizeof(SORT_377) * 8 - 8); [L74] const SORT_377 msb_SORT_377 = (SORT_377)1 << (8 - 1); [L76] const SORT_3 var_6 = 0; [L77] const SORT_9 var_11 = 3; [L78] const SORT_9 var_14 = 4; [L79] const SORT_9 var_23 = 0; [L80] const SORT_1 var_35 = 1; [L81] const SORT_1 var_43 = 0; [L82] const SORT_48 var_49 = 0; [L83] const SORT_9 var_62 = 2; [L84] const SORT_9 var_66 = 1; [L85] const SORT_9 var_72 = 5; [L86] const SORT_86 var_87 = 0; [L87] const SORT_138 var_140 = 5; [L88] const SORT_138 var_144 = 4; [L89] const SORT_138 var_148 = 3; [L90] const SORT_138 var_152 = 2; [L91] const SORT_138 var_156 = 1; [L92] const SORT_138 var_160 = 0; [L93] const SORT_48 var_199 = 2; [L94] const SORT_17 var_215 = 0; [L95] const SORT_3 var_222 = 65535; [L97] SORT_1 input_2; [L98] SORT_3 input_4; [L99] SORT_3 input_5; [L100] SORT_3 input_211; [L101] SORT_3 input_212; [L102] SORT_3 input_213; [L103] SORT_3 input_221; [L104] SORT_3 input_229; [L105] SORT_3 input_230; [L106] SORT_3 input_231; [L107] SORT_3 input_234; [L108] SORT_3 input_252; [L109] SORT_3 input_253; [L110] SORT_3 input_254; [L111] SORT_3 input_257; [L112] SORT_3 input_259; [L113] SORT_17 input_273; [L114] SORT_17 input_274; [L115] SORT_17 input_275; [L117] SORT_3 state_7 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L118] SORT_9 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_9; [L119] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L120] SORT_3 state_39 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L121] SORT_3 state_41 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L122] SORT_1 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_3 state_46 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L124] SORT_48 state_50 = __VERIFIER_nondet_ushort() & mask_SORT_48; [L125] SORT_48 state_52 = __VERIFIER_nondet_ushort() & mask_SORT_48; [L126] SORT_3 state_54 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L127] SORT_3 state_56 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L128] SORT_3 state_58 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L129] SORT_3 state_60 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L131] SORT_3 init_8_arg_1 = var_6; [L132] state_7 = init_8_arg_1 [L133] SORT_9 init_25_arg_1 = var_23; [L134] state_24 = init_25_arg_1 [L135] SORT_3 init_29_arg_1 = var_6; [L136] state_28 = init_29_arg_1 [L137] SORT_3 init_40_arg_1 = var_6; [L138] state_39 = init_40_arg_1 [L139] SORT_3 init_42_arg_1 = var_6; [L140] state_41 = init_42_arg_1 [L141] SORT_1 init_45_arg_1 = var_43; [L142] state_44 = init_45_arg_1 [L143] SORT_3 init_47_arg_1 = var_6; [L144] state_46 = init_47_arg_1 [L145] SORT_48 init_51_arg_1 = var_49; [L146] state_50 = init_51_arg_1 [L147] SORT_48 init_53_arg_1 = var_49; [L148] state_52 = init_53_arg_1 [L149] SORT_3 init_55_arg_1 = var_6; [L150] state_54 = init_55_arg_1 [L151] SORT_3 init_57_arg_1 = var_6; [L152] state_56 = init_57_arg_1 [L153] SORT_3 init_59_arg_1 = var_6; [L154] state_58 = init_59_arg_1 [L155] SORT_3 init_61_arg_1 = var_6; [L156] state_60 = init_61_arg_1 VAL [init_25_arg_1=0, init_29_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_45_arg_1=0, init_47_arg_1=0, init_51_arg_1=0, init_53_arg_1=0, init_55_arg_1=0, init_57_arg_1=0, init_59_arg_1=0, init_61_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_102=16383, mask_SORT_105=32767, mask_SORT_138=127, mask_SORT_17=3, mask_SORT_3=65535, mask_SORT_371=15, mask_SORT_374=63, mask_SORT_377=255, mask_SORT_48=4095, mask_SORT_85=4294967295, mask_SORT_86=31, mask_SORT_89=511, mask_SORT_9=7, mask_SORT_91=1023, mask_SORT_94=2047, mask_SORT_99=8191, msb_SORT_1=1, msb_SORT_102=8192, msb_SORT_105=16384, msb_SORT_138=64, msb_SORT_17=2, msb_SORT_3=32768, msb_SORT_371=8, msb_SORT_374=32, msb_SORT_377=128, msb_SORT_48=2048, msb_SORT_85=65536, msb_SORT_86=16, msb_SORT_89=256, msb_SORT_9=4, msb_SORT_91=512, msb_SORT_94=1024, msb_SORT_99=4096, state_24=0, state_28=0, state_39=0, state_41=0, state_44=0, state_46=0, state_50=0, state_52=0, state_54=0, state_56=0, state_58=0, state_60=0, state_7=0, var_11=3, var_14=4, var_140=5, var_144=4, var_148=3, var_152=2, var_156=1, var_160=0, var_199=2, var_215=0, var_222=65535, var_23=0, var_35=1, var_43=0, var_49=0, var_6=0, var_62=2, var_66=1, var_72=5, var_87=0] [L159] input_2 = __VERIFIER_nondet_uchar() [L160] input_4 = __VERIFIER_nondet_ushort() [L161] input_5 = __VERIFIER_nondet_ushort() [L162] input_211 = __VERIFIER_nondet_ushort() [L163] input_212 = __VERIFIER_nondet_ushort() [L164] input_213 = __VERIFIER_nondet_ushort() [L165] input_221 = __VERIFIER_nondet_ushort() [L166] input_229 = __VERIFIER_nondet_ushort() [L167] input_230 = __VERIFIER_nondet_ushort() [L168] input_231 = __VERIFIER_nondet_ushort() [L169] input_234 = __VERIFIER_nondet_ushort() [L170] input_252 = __VERIFIER_nondet_ushort() [L171] input_253 = __VERIFIER_nondet_ushort() [L172] input_254 = __VERIFIER_nondet_ushort() [L173] input_257 = __VERIFIER_nondet_ushort() [L174] input_259 = __VERIFIER_nondet_ushort() [L175] input_273 = __VERIFIER_nondet_uchar() [L176] input_274 = __VERIFIER_nondet_uchar() [L177] input_275 = __VERIFIER_nondet_uchar() [L180] SORT_3 var_10_arg_0 = state_7; [L181] SORT_9 var_10 = var_10_arg_0 >> 0; [L182] var_10 = var_10 & mask_SORT_9 [L183] SORT_9 var_12_arg_0 = var_10; [L184] SORT_9 var_12_arg_1 = var_11; [L185] SORT_1 var_12 = var_12_arg_0 == var_12_arg_1; [L186] SORT_3 var_13_arg_0 = state_7; [L187] SORT_9 var_13 = var_13_arg_0 >> 9; [L188] var_13 = var_13 & mask_SORT_9 [L189] SORT_9 var_15_arg_0 = var_13; [L190] SORT_9 var_15_arg_1 = var_14; [L191] SORT_1 var_15 = var_15_arg_0 == var_15_arg_1; [L192] SORT_1 var_16_arg_0 = var_12; [L193] SORT_1 var_16_arg_1 = var_15; [L194] SORT_1 var_16 = var_16_arg_0 & var_16_arg_1; [L195] SORT_3 var_18_arg_0 = state_7; [L196] SORT_17 var_18 = var_18_arg_0 >> 3; [L197] var_18 = var_18 & mask_SORT_17 [L198] SORT_3 var_19_arg_0 = state_7; [L199] SORT_17 var_19 = var_19_arg_0 >> 5; [L200] var_19 = var_19 & mask_SORT_17 [L201] SORT_17 var_20_arg_0 = var_18; [L202] SORT_17 var_20_arg_1 = var_19; [L203] SORT_1 var_20 = var_20_arg_0 == var_20_arg_1; [L204] SORT_1 var_21_arg_0 = var_16; [L205] SORT_1 var_21_arg_1 = var_20; [L206] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L207] SORT_1 var_22_arg_0 = var_21; [L208] SORT_1 var_22 = ~var_22_arg_0; [L209] SORT_9 var_26_arg_0 = state_24; [L210] SORT_1 var_26 = var_26_arg_0 >> 2; [L211] SORT_1 var_27_arg_0 = var_26; [L212] SORT_1 var_27 = ~var_27_arg_0; [L213] SORT_3 var_30_arg_0 = state_28; [L214] SORT_3 var_30_arg_1 = var_6; [L215] SORT_1 var_30 = var_30_arg_0 == var_30_arg_1; [L216] SORT_1 var_31_arg_0 = var_27; [L217] SORT_1 var_31_arg_1 = var_30; [L218] SORT_1 var_31 = var_31_arg_0 | var_31_arg_1; [L219] SORT_1 var_32_arg_0 = var_22; [L220] SORT_1 var_32_arg_1 = var_31; [L221] SORT_1 var_32 = var_32_arg_0 | var_32_arg_1; [L222] SORT_1 var_36_arg_0 = var_32; [L223] SORT_1 var_36 = ~var_36_arg_0; [L224] SORT_1 var_37_arg_0 = var_35; [L225] SORT_1 var_37_arg_1 = var_36; [L226] SORT_1 var_37 = var_37_arg_0 & var_37_arg_1; [L227] var_37 = var_37 & mask_SORT_1 [L228] SORT_1 bad_38_arg_0 = var_37; [L229] CALL __VERIFIER_assert(!(bad_38_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: 1.0s, 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, 0.4s 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 01:58:09,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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 5cac0223dd723d5cf2812b282c3448409c51f83effd590c85b50f84f0401207a --- 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 01:58:12,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:58:12,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:58:12,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:58:12,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:58:12,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:58:12,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:58:12,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:58:12,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:58:12,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:58:12,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:58:12,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:58:12,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:58:12,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:58:12,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:58:12,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:58:12,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:58:12,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:58:12,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:58:12,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:58:12,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:58:12,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:58:12,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:58:12,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:58:12,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:58:12,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:58:12,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:58:12,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:58:12,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:58:12,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:58:12,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:58:12,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:58:12,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:58:12,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:58:12,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:58:12,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:58:12,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:58:12,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:58:12,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:58:12,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:58:12,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:58:12,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:58:12,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:58:12,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:58:12,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:58:12,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:58:12,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:58:12,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:58:12,471 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:58:12,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:58:12,471 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:58:12,471 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:58:12,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:58:12,473 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:58:12,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:58:12,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:58:12,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:58:12,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:58:12,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:58:12,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:58:12,476 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:58:12,476 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:58:12,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:58:12,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:58:12,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:58:12,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:58:12,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:58:12,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:58:12,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:12,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:58:12,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:58:12,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:58:12,479 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:58:12,480 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:12,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:58:12,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:58:12,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:58:12,481 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0223dd723d5cf2812b282c3448409c51f83effd590c85b50f84f0401207a [2022-11-03 01:58:12,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:58:12,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:58:12,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:58:12,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:58:12,919 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:58:12,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:58:13,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/31a515e89/0ebde9eab83c49aba1676309c4d5c975/FLAGc85145fc9 [2022-11-03 01:58:13,725 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:58:13,726 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:58:13,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/31a515e89/0ebde9eab83c49aba1676309c4d5c975/FLAGc85145fc9 [2022-11-03 01:58:13,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/data/31a515e89/0ebde9eab83c49aba1676309c4d5c975 [2022-11-03 01:58:13,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:58:13,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:58:13,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:13,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:58:13,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:58:13,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498df856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13, skipping insertion in model container [2022-11-03 01:58:13,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:58:14,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:58:14,322 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c[1107,1120] [2022-11-03 01:58:14,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:14,843 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:58:14,854 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_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p6.c[1107,1120] [2022-11-03 01:58:14,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:15,000 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:58:15,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15 WrapperNode [2022-11-03 01:58:15,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:15,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:15,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:58:15,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:58:15,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,180 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2316 [2022-11-03 01:58:15,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:15,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:58:15,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:58:15,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:58:15,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:58:15,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:58:15,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:58:15,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:58:15,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (1/1) ... [2022-11-03 01:58:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:15,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:58:15,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:58:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:58:15,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:58:16,104 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:58:16,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:58:17,833 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:58:17,854 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:58:17,855 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:58:17,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:17 BoogieIcfgContainer [2022-11-03 01:58:17,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:58:17,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:58:17,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:58:17,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:58:17,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:58:13" (1/3) ... [2022-11-03 01:58:17,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b06f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:17, skipping insertion in model container [2022-11-03 01:58:17,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:15" (2/3) ... [2022-11-03 01:58:17,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b06f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:17, skipping insertion in model container [2022-11-03 01:58:17,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:17" (3/3) ... [2022-11-03 01:58:17,868 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p6.c [2022-11-03 01:58:17,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:58:17,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:58:17,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:58:17,959 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;@ae3753a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:58:17,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:58:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:58:17,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:17,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:58:17,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:58:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:18,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313165843] [2022-11-03 01:58:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:18,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:18,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:58:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:58:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:18,788 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 01:58:18,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:18,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313165843] [2022-11-03 01:58:18,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313165843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:18,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:18,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864147576] [2022-11-03 01:58:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:18,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:58:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:58:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:58:18,844 INFO L87 Difference]: Start difference. First operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:19,544 INFO L93 Difference]: Finished difference Result 794 states and 1191 transitions. [2022-11-03 01:58:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 01:58:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:19,571 INFO L225 Difference]: With dead ends: 794 [2022-11-03 01:58:19,574 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 01:58:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 01:58:19,588 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 777 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1018 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 01:58:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 267. [2022-11-03 01:58:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 396 transitions. [2022-11-03 01:58:19,659 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 396 transitions. Word has length 5 [2022-11-03 01:58:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:19,659 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 396 transitions. [2022-11-03 01:58:19,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 396 transitions. [2022-11-03 01:58:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:19,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:19,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:19,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:19,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:19,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -464126881, now seen corresponding path program 1 times [2022-11-03 01:58:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:19,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461633981] [2022-11-03 01:58:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:19,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:19,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:58:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:21,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:21,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:21,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461633981] [2022-11-03 01:58:21,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461633981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:21,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:21,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:21,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425090901] [2022-11-03 01:58:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:58:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:58:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:58:21,179 INFO L87 Difference]: Start difference. First operand 267 states and 396 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:21,370 INFO L93 Difference]: Finished difference Result 1051 states and 1566 transitions. [2022-11-03 01:58:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:21,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:21,377 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:58:21,377 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:58:21,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 01:58:21,385 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1151 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1542 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 01:58:21,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1542 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:58:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 273. [2022-11-03 01:58:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4852941176470589) internal successors, (404), 272 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 404 transitions. [2022-11-03 01:58:21,419 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 404 transitions. Word has length 266 [2022-11-03 01:58:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:21,420 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 404 transitions. [2022-11-03 01:58:21,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 404 transitions. [2022-11-03 01:58:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:21,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:21,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:21,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:21,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1252934559, now seen corresponding path program 1 times [2022-11-03 01:58:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847458467] [2022-11-03 01:58:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:21,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:21,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:58:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:22,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:22,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:22,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:22,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847458467] [2022-11-03 01:58:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847458467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:22,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:22,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728122124] [2022-11-03 01:58:22,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:22,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:22,864 INFO L87 Difference]: Start difference. First operand 273 states and 404 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:23,063 INFO L93 Difference]: Finished difference Result 1060 states and 1576 transitions. [2022-11-03 01:58:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:23,068 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:23,068 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:23,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:23,072 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1546 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:23,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 2314 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 275. [2022-11-03 01:58:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.4817518248175183) internal successors, (406), 274 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 406 transitions. [2022-11-03 01:58:23,092 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 406 transitions. Word has length 266 [2022-11-03 01:58:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:23,094 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 406 transitions. [2022-11-03 01:58:23,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 406 transitions. [2022-11-03 01:58:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:23,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:23,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:23,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:23,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1428056861, now seen corresponding path program 1 times [2022-11-03 01:58:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:23,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146552713] [2022-11-03 01:58:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:23,324 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:23,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:58:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:24,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:24,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146552713] [2022-11-03 01:58:24,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146552713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:24,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:24,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788717375] [2022-11-03 01:58:24,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:24,496 INFO L87 Difference]: Start difference. First operand 275 states and 406 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:24,718 INFO L93 Difference]: Finished difference Result 1060 states and 1575 transitions. [2022-11-03 01:58:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:24,722 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:24,722 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:24,724 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1539 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:24,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1539 Valid, 2310 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 277. [2022-11-03 01:58:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.4782608695652173) internal successors, (408), 276 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 408 transitions. [2022-11-03 01:58:24,736 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 408 transitions. Word has length 266 [2022-11-03 01:58:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:24,737 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 408 transitions. [2022-11-03 01:58:24,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 408 transitions. [2022-11-03 01:58:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:24,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:24,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:24,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:24,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1271814683, now seen corresponding path program 1 times [2022-11-03 01:58:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:24,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858209039] [2022-11-03 01:58:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:24,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:24,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:24,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:58:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:25,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:25,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:25,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:25,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858209039] [2022-11-03 01:58:25,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858209039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:25,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:25,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686249840] [2022-11-03 01:58:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:25,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:25,944 INFO L87 Difference]: Start difference. First operand 277 states and 408 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:26,134 INFO L93 Difference]: Finished difference Result 1060 states and 1574 transitions. [2022-11-03 01:58:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:26,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:26,139 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:26,139 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:26,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:26,142 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1532 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:26,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 2306 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 279. [2022-11-03 01:58:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.474820143884892) internal successors, (410), 278 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 410 transitions. [2022-11-03 01:58:26,155 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 410 transitions. Word has length 266 [2022-11-03 01:58:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:26,156 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 410 transitions. [2022-11-03 01:58:26,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 410 transitions. [2022-11-03 01:58:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:26,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:26,160 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:26,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:26,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -587853977, now seen corresponding path program 1 times [2022-11-03 01:58:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778719458] [2022-11-03 01:58:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:26,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:26,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:26,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:58:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:27,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:27,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778719458] [2022-11-03 01:58:27,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778719458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:27,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:27,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769748857] [2022-11-03 01:58:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:27,334 INFO L87 Difference]: Start difference. First operand 279 states and 410 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:27,509 INFO L93 Difference]: Finished difference Result 1060 states and 1573 transitions. [2022-11-03 01:58:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:27,513 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:27,513 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:27,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:27,515 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1525 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:27,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 2302 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 281. [2022-11-03 01:58:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4714285714285715) internal successors, (412), 280 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 412 transitions. [2022-11-03 01:58:27,525 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 412 transitions. Word has length 266 [2022-11-03 01:58:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:27,526 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 412 transitions. [2022-11-03 01:58:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 412 transitions. [2022-11-03 01:58:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:27,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:27,530 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:27,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:27,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:27,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -815074967, now seen corresponding path program 1 times [2022-11-03 01:58:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:27,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100691185] [2022-11-03 01:58:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:27,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:27,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:27,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:27,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:58:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:28,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:28,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100691185] [2022-11-03 01:58:28,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100691185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:28,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:28,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924533463] [2022-11-03 01:58:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:28,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:28,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:28,747 INFO L87 Difference]: Start difference. First operand 281 states and 412 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:29,053 INFO L93 Difference]: Finished difference Result 1072 states and 1590 transitions. [2022-11-03 01:58:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:29,056 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:58:29,057 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:58:29,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:58:29,059 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1913 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1913 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:29,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1913 Valid, 3011 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:58:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 287. [2022-11-03 01:58:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4685314685314685) internal successors, (420), 286 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 420 transitions. [2022-11-03 01:58:29,072 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 420 transitions. Word has length 266 [2022-11-03 01:58:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:29,072 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 420 transitions. [2022-11-03 01:58:29,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 420 transitions. [2022-11-03 01:58:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:29,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:29,079 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:29,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:29,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:29,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1806302443, now seen corresponding path program 1 times [2022-11-03 01:58:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244329588] [2022-11-03 01:58:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:29,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:29,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:58:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:30,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:30,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:30,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:30,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:30,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244329588] [2022-11-03 01:58:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244329588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569235972] [2022-11-03 01:58:30,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:30,342 INFO L87 Difference]: Start difference. First operand 287 states and 420 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:30,547 INFO L93 Difference]: Finished difference Result 1052 states and 1561 transitions. [2022-11-03 01:58:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:30,552 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 01:58:30,552 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 01:58:30,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:30,554 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1489 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2267 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 01:58:30,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2267 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 01:58:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 289. [2022-11-03 01:58:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4652777777777777) internal successors, (422), 288 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 422 transitions. [2022-11-03 01:58:30,566 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 422 transitions. Word has length 266 [2022-11-03 01:58:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:30,567 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 422 transitions. [2022-11-03 01:58:30,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 422 transitions. [2022-11-03 01:58:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:30,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:30,572 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:30,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:30,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:30,785 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1406796013, now seen corresponding path program 1 times [2022-11-03 01:58:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961381199] [2022-11-03 01:58:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:30,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:30,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:58:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:58:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:31,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:31,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961381199] [2022-11-03 01:58:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961381199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:31,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:31,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:31,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874568007] [2022-11-03 01:58:31,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:31,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:31,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:31,987 INFO L87 Difference]: Start difference. First operand 289 states and 422 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:32,936 INFO L93 Difference]: Finished difference Result 1072 states and 1588 transitions. [2022-11-03 01:58:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:32,941 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:58:32,941 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:58:32,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:58:32,942 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1894 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:32,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1894 Valid, 2659 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:58:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:58:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 291. [2022-11-03 01:58:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4620689655172414) internal successors, (424), 290 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 424 transitions. [2022-11-03 01:58:32,954 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 424 transitions. Word has length 266 [2022-11-03 01:58:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:32,954 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 424 transitions. [2022-11-03 01:58:32,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 424 transitions. [2022-11-03 01:58:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:32,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:32,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:32,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:33,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:33,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1759452527, now seen corresponding path program 1 times [2022-11-03 01:58:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:33,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601343224] [2022-11-03 01:58:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:33,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:33,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:58:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:34,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:34,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:34,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601343224] [2022-11-03 01:58:34,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601343224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:34,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:34,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679236880] [2022-11-03 01:58:34,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:34,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:34,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:34,245 INFO L87 Difference]: Start difference. First operand 291 states and 424 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:34,590 INFO L93 Difference]: Finished difference Result 1060 states and 1569 transitions. [2022-11-03 01:58:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:34,594 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:34,594 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:34,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:58:34,596 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1866 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1866 Valid, 2978 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 293. [2022-11-03 01:58:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4589041095890412) internal successors, (426), 292 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-11-03 01:58:34,612 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 266 [2022-11-03 01:58:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:34,613 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-11-03 01:58:34,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-11-03 01:58:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:34,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:34,616 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:34,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:34,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:34,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1239059855, now seen corresponding path program 1 times [2022-11-03 01:58:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:34,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433170955] [2022-11-03 01:58:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:34,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:58:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:35,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:35,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:35,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433170955] [2022-11-03 01:58:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433170955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:35,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:35,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151803033] [2022-11-03 01:58:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:35,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:35,829 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:36,131 INFO L93 Difference]: Finished difference Result 1060 states and 1568 transitions. [2022-11-03 01:58:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:36,140 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:36,141 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:36,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:36,142 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1475 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 2239 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 297. [2022-11-03 01:58:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4560810810810811) internal successors, (431), 296 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 431 transitions. [2022-11-03 01:58:36,154 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 431 transitions. Word has length 266 [2022-11-03 01:58:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:36,155 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 431 transitions. [2022-11-03 01:58:36,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 431 transitions. [2022-11-03 01:58:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:36,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:36,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:36,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:36,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash -900556685, now seen corresponding path program 1 times [2022-11-03 01:58:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:36,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847030798] [2022-11-03 01:58:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:36,377 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:36,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:58:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:37,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:37,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:37,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847030798] [2022-11-03 01:58:37,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847030798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:37,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241711947] [2022-11-03 01:58:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:58:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:58:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:58:37,437 INFO L87 Difference]: Start difference. First operand 297 states and 431 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:38,074 INFO L93 Difference]: Finished difference Result 1051 states and 1556 transitions. [2022-11-03 01:58:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:38,078 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:58:38,079 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:58:38,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 01:58:38,080 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1075 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:38,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1330 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:58:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 299. [2022-11-03 01:58:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4530201342281879) internal successors, (433), 298 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 433 transitions. [2022-11-03 01:58:38,092 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 433 transitions. Word has length 266 [2022-11-03 01:58:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:38,093 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 433 transitions. [2022-11-03 01:58:38,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 433 transitions. [2022-11-03 01:58:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:38,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:38,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:38,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:38,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:38,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash -868919563, now seen corresponding path program 1 times [2022-11-03 01:58:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:38,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663956262] [2022-11-03 01:58:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:38,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:38,312 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:38,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:58:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:39,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:39,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:39,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663956262] [2022-11-03 01:58:39,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663956262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:39,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:39,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:39,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022033189] [2022-11-03 01:58:39,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:39,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:39,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:39,340 INFO L87 Difference]: Start difference. First operand 299 states and 433 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:39,962 INFO L93 Difference]: Finished difference Result 1086 states and 1605 transitions. [2022-11-03 01:58:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:39,968 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:58:39,968 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 01:58:39,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:39,970 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1508 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:39,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 2099 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 01:58:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 301. [2022-11-03 01:58:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.45) internal successors, (435), 300 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 435 transitions. [2022-11-03 01:58:39,979 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 435 transitions. Word has length 266 [2022-11-03 01:58:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:39,980 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 435 transitions. [2022-11-03 01:58:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 435 transitions. [2022-11-03 01:58:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:39,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:39,982 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:40,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:40,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:40,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2057712137, now seen corresponding path program 1 times [2022-11-03 01:58:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:40,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741335131] [2022-11-03 01:58:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:40,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:40,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:40,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:58:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:41,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:41,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741335131] [2022-11-03 01:58:41,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741335131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:41,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:41,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187419205] [2022-11-03 01:58:41,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:41,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:41,218 INFO L87 Difference]: Start difference. First operand 301 states and 435 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:41,444 INFO L93 Difference]: Finished difference Result 1086 states and 1604 transitions. [2022-11-03 01:58:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:41,448 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 01:58:41,448 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 01:58:41,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:41,450 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1498 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2265 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 01:58:41,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2265 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 01:58:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 305. [2022-11-03 01:58:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4473684210526316) internal successors, (440), 304 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 440 transitions. [2022-11-03 01:58:41,464 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 440 transitions. Word has length 266 [2022-11-03 01:58:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:41,465 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 440 transitions. [2022-11-03 01:58:41,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 440 transitions. [2022-11-03 01:58:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:41,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:41,467 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:41,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:41,693 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1573262841, now seen corresponding path program 1 times [2022-11-03 01:58:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902144078] [2022-11-03 01:58:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:41,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:41,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:41,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:41,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:58:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:42,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:42,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902144078] [2022-11-03 01:58:42,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902144078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:42,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:42,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:42,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609632796] [2022-11-03 01:58:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:42,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:58:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:58:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:58:42,731 INFO L87 Difference]: Start difference. First operand 305 states and 440 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:43,280 INFO L93 Difference]: Finished difference Result 1051 states and 1553 transitions. [2022-11-03 01:58:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:43,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:43,283 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:58:43,283 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:58:43,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 01:58:43,287 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1052 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:43,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1327 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:58:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:58:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 307. [2022-11-03 01:58:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4444444444444444) internal successors, (442), 306 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 442 transitions. [2022-11-03 01:58:43,308 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 442 transitions. Word has length 266 [2022-11-03 01:58:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:43,308 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 442 transitions. [2022-11-03 01:58:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 442 transitions. [2022-11-03 01:58:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:43,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:43,310 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:43,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:43,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:43,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 222852731, now seen corresponding path program 1 times [2022-11-03 01:58:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733824617] [2022-11-03 01:58:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:43,529 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:43,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:58:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:44,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:44,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733824617] [2022-11-03 01:58:44,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733824617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:44,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:44,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463050131] [2022-11-03 01:58:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:44,522 INFO L87 Difference]: Start difference. First operand 307 states and 442 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:45,152 INFO L93 Difference]: Finished difference Result 1094 states and 1614 transitions. [2022-11-03 01:58:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:45,156 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 01:58:45,156 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 01:58:45,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:45,158 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1497 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:45,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 2095 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 01:58:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 309. [2022-11-03 01:58:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4415584415584415) internal successors, (444), 308 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 444 transitions. [2022-11-03 01:58:45,169 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 444 transitions. Word has length 266 [2022-11-03 01:58:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:45,169 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 444 transitions. [2022-11-03 01:58:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 444 transitions. [2022-11-03 01:58:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:45,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:45,172 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:45,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:45,399 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash 999100285, now seen corresponding path program 1 times [2022-11-03 01:58:45,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734821678] [2022-11-03 01:58:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:45,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:45,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:45,402 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:45,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:58:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:46,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:46,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:46,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734821678] [2022-11-03 01:58:46,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734821678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:46,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:46,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:46,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573611779] [2022-11-03 01:58:46,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:46,443 INFO L87 Difference]: Start difference. First operand 309 states and 444 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:47,015 INFO L93 Difference]: Finished difference Result 1094 states and 1613 transitions. [2022-11-03 01:58:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:47,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:47,018 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 01:58:47,018 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 01:58:47,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:47,022 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1490 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:47,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 2091 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:58:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 01:58:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 311. [2022-11-03 01:58:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4387096774193548) internal successors, (446), 310 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 446 transitions. [2022-11-03 01:58:47,035 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 446 transitions. Word has length 266 [2022-11-03 01:58:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:47,035 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 446 transitions. [2022-11-03 01:58:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 446 transitions. [2022-11-03 01:58:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:47,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:47,038 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:47,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:47,261 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash -859307777, now seen corresponding path program 1 times [2022-11-03 01:58:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099241428] [2022-11-03 01:58:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:47,264 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:58:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:48,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:48,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:48,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099241428] [2022-11-03 01:58:48,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099241428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:48,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:48,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200568543] [2022-11-03 01:58:48,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:48,247 INFO L87 Difference]: Start difference. First operand 311 states and 446 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:48,443 INFO L93 Difference]: Finished difference Result 1094 states and 1612 transitions. [2022-11-03 01:58:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:48,446 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 01:58:48,446 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 01:58:48,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:48,448 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1485 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:48,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 2260 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 01:58:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 313. [2022-11-03 01:58:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.435897435897436) internal successors, (448), 312 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-11-03 01:58:48,459 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 266 [2022-11-03 01:58:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:48,459 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-11-03 01:58:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-11-03 01:58:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:48,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:48,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:48,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:48,685 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1672833793, now seen corresponding path program 1 times [2022-11-03 01:58:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775810127] [2022-11-03 01:58:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:48,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:48,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:58:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:49,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:49,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775810127] [2022-11-03 01:58:49,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775810127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:49,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:49,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952554164] [2022-11-03 01:58:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:49,641 INFO L87 Difference]: Start difference. First operand 313 states and 448 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:49,861 INFO L93 Difference]: Finished difference Result 1076 states and 1584 transitions. [2022-11-03 01:58:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:49,865 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 01:58:49,865 INFO L226 Difference]: Without dead ends: 813 [2022-11-03 01:58:49,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:58:49,867 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 1816 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:49,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1816 Valid, 2952 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-11-03 01:58:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 315. [2022-11-03 01:58:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4331210191082802) internal successors, (450), 314 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 450 transitions. [2022-11-03 01:58:49,876 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 450 transitions. Word has length 266 [2022-11-03 01:58:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:49,876 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 450 transitions. [2022-11-03 01:58:49,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 450 transitions. [2022-11-03 01:58:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:49,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:49,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:49,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:50,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:50,089 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1670999427, now seen corresponding path program 1 times [2022-11-03 01:58:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189119161] [2022-11-03 01:58:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:50,092 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:50,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:58:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:50,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:50,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:50,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189119161] [2022-11-03 01:58:50,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189119161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:50,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:50,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660746555] [2022-11-03 01:58:50,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:50,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:50,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:50,978 INFO L87 Difference]: Start difference. First operand 315 states and 450 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:51,228 INFO L93 Difference]: Finished difference Result 1060 states and 1559 transitions. [2022-11-03 01:58:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:51,231 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:58:51,231 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:58:51,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:58:51,235 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1771 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:51,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1771 Valid, 2890 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:58:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 319. [2022-11-03 01:58:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.430817610062893) internal successors, (455), 318 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 455 transitions. [2022-11-03 01:58:51,246 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 455 transitions. Word has length 266 [2022-11-03 01:58:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:51,246 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 455 transitions. [2022-11-03 01:58:51,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 455 transitions. [2022-11-03 01:58:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:51,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:51,248 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:51,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:51,463 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1800864005, now seen corresponding path program 1 times [2022-11-03 01:58:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669290352] [2022-11-03 01:58:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:51,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:58:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:52,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:52,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669290352] [2022-11-03 01:58:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669290352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:52,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:52,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:52,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907047069] [2022-11-03 01:58:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:52,441 INFO L87 Difference]: Start difference. First operand 319 states and 455 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:52,699 INFO L93 Difference]: Finished difference Result 1102 states and 1621 transitions. [2022-11-03 01:58:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:52,703 INFO L225 Difference]: With dead ends: 1102 [2022-11-03 01:58:52,703 INFO L226 Difference]: Without dead ends: 839 [2022-11-03 01:58:52,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:52,705 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 1470 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:52,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 2249 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-03 01:58:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 323. [2022-11-03 01:58:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4285714285714286) internal successors, (460), 322 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 460 transitions. [2022-11-03 01:58:52,715 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 460 transitions. Word has length 266 [2022-11-03 01:58:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:52,715 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 460 transitions. [2022-11-03 01:58:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 460 transitions. [2022-11-03 01:58:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:52,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:52,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:52,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:52,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:52,941 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1079944583, now seen corresponding path program 1 times [2022-11-03 01:58:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:52,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189247485] [2022-11-03 01:58:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:52,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:52,946 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:52,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:58:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:53,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:53,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:54,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:54,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189247485] [2022-11-03 01:58:54,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189247485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:54,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:54,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:54,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527899470] [2022-11-03 01:58:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:54,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:54,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:54,013 INFO L87 Difference]: Start difference. First operand 323 states and 460 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:54,217 INFO L93 Difference]: Finished difference Result 1112 states and 1635 transitions. [2022-11-03 01:58:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:54,222 INFO L225 Difference]: With dead ends: 1112 [2022-11-03 01:58:54,222 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 01:58:54,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:54,223 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1471 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:54,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 2257 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 01:58:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 329. [2022-11-03 01:58:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.4268292682926829) internal successors, (468), 328 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 468 transitions. [2022-11-03 01:58:54,232 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 468 transitions. Word has length 266 [2022-11-03 01:58:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:54,232 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 468 transitions. [2022-11-03 01:58:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 468 transitions. [2022-11-03 01:58:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:54,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:54,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:54,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:54,435 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -887860343, now seen corresponding path program 1 times [2022-11-03 01:58:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:54,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352781841] [2022-11-03 01:58:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:54,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:54,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:54,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:58:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:58:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:55,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:55,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352781841] [2022-11-03 01:58:55,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352781841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:55,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:55,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011074197] [2022-11-03 01:58:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:58:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:58:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:58:55,352 INFO L87 Difference]: Start difference. First operand 329 states and 468 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:55,418 INFO L93 Difference]: Finished difference Result 1051 states and 1545 transitions. [2022-11-03 01:58:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:55,422 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:58:55,422 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:58:55,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 01:58:55,423 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 980 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1524 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 01:58:55,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1524 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:58:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:58:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 333. [2022-11-03 01:58:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.4246987951807228) internal successors, (473), 332 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 473 transitions. [2022-11-03 01:58:55,433 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 473 transitions. Word has length 266 [2022-11-03 01:58:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 473 transitions. [2022-11-03 01:58:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 473 transitions. [2022-11-03 01:58:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:55,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:55,436 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:55,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:55,652 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1682264715, now seen corresponding path program 1 times [2022-11-03 01:58:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868527876] [2022-11-03 01:58:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:55,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:55,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:55,655 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:55,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:58:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:58:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:56,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:56,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868527876] [2022-11-03 01:58:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868527876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:56,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:56,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284022782] [2022-11-03 01:58:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:56,750 INFO L87 Difference]: Start difference. First operand 333 states and 473 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:56,961 INFO L93 Difference]: Finished difference Result 1120 states and 1645 transitions. [2022-11-03 01:58:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:56,965 INFO L225 Difference]: With dead ends: 1120 [2022-11-03 01:58:56,965 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 01:58:56,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:56,966 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 1460 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:56,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2253 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 01:58:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 337. [2022-11-03 01:58:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2022-11-03 01:58:56,973 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 266 [2022-11-03 01:58:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:56,973 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2022-11-03 01:58:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2022-11-03 01:58:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:56,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:56,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:56,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 01:58:57,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:57,189 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash -398318963, now seen corresponding path program 1 times [2022-11-03 01:58:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:57,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024833534] [2022-11-03 01:58:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:57,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:57,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:58:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:58:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:58,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:58,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024833534] [2022-11-03 01:58:58,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024833534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:58,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:58,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:58,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679942117] [2022-11-03 01:58:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:58,263 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:58,495 INFO L93 Difference]: Finished difference Result 1052 states and 1544 transitions. [2022-11-03 01:58:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:58:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:58:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:58,498 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 01:58:58,498 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 01:58:58,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:58:58,499 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1328 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:58,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1328 Valid, 2167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 01:58:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 339. [2022-11-03 01:58:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.4201183431952662) internal successors, (480), 338 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 480 transitions. [2022-11-03 01:58:58,507 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 480 transitions. Word has length 266 [2022-11-03 01:58:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:58,507 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 480 transitions. [2022-11-03 01:58:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 480 transitions. [2022-11-03 01:58:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:58:58,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:58,509 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:58,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 01:58:58,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:58,717 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2111245071, now seen corresponding path program 1 times [2022-11-03 01:58:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:58,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725502086] [2022-11-03 01:58:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:58,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:58,719 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:58:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:59,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:58:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:59,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:59,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:59,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725502086] [2022-11-03 01:58:59,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725502086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:59,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:59,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:58:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77002032] [2022-11-03 01:58:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:59,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:59,827 INFO L87 Difference]: Start difference. First operand 339 states and 480 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:00,656 INFO L93 Difference]: Finished difference Result 1072 states and 1571 transitions. [2022-11-03 01:59:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:00,661 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:59:00,661 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:59:00,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:00,663 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1718 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:00,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 2496 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:59:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:59:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 341. [2022-11-03 01:59:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-03 01:59:00,672 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 266 [2022-11-03 01:59:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:00,672 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-03 01:59:00,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-03 01:59:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:00,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:00,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:00,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:00,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:00,889 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2060440559, now seen corresponding path program 1 times [2022-11-03 01:59:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810395015] [2022-11-03 01:59:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:00,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:00,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:59:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:01,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:01,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810395015] [2022-11-03 01:59:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810395015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:01,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:01,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:01,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511361686] [2022-11-03 01:59:01,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:01,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:01,876 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:02,120 INFO L93 Difference]: Finished difference Result 1060 states and 1552 transitions. [2022-11-03 01:59:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:02,122 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:59:02,122 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:02,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:02,123 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 1690 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:02,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 2813 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 343. [2022-11-03 01:59:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.4152046783625731) internal successors, (484), 342 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2022-11-03 01:59:02,133 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 266 [2022-11-03 01:59:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:02,133 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2022-11-03 01:59:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2022-11-03 01:59:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:02,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:02,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:02,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 01:59:02,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:02,349 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1157519981, now seen corresponding path program 1 times [2022-11-03 01:59:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:02,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334845536] [2022-11-03 01:59:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:02,352 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:02,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:59:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:03,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:03,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:03,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334845536] [2022-11-03 01:59:03,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334845536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:03,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:03,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172657200] [2022-11-03 01:59:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:03,499 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:03,721 INFO L93 Difference]: Finished difference Result 1126 states and 1650 transitions. [2022-11-03 01:59:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:03,725 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 01:59:03,725 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 01:59:03,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:03,727 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1443 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:03,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2241 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 01:59:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 345. [2022-11-03 01:59:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4127906976744187) internal successors, (486), 344 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 486 transitions. [2022-11-03 01:59:03,735 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 486 transitions. Word has length 266 [2022-11-03 01:59:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:03,736 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 486 transitions. [2022-11-03 01:59:03,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 486 transitions. [2022-11-03 01:59:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:03,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:03,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:03,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:03,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,961 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1165518955, now seen corresponding path program 1 times [2022-11-03 01:59:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:03,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409781134] [2022-11-03 01:59:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:03,964 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:03,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:59:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:05,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:05,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409781134] [2022-11-03 01:59:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409781134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:05,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:05,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045043659] [2022-11-03 01:59:05,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:05,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:05,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:05,037 INFO L87 Difference]: Start difference. First operand 345 states and 486 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:05,262 INFO L93 Difference]: Finished difference Result 1052 states and 1540 transitions. [2022-11-03 01:59:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:05,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:05,265 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 01:59:05,265 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 01:59:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:05,267 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 1300 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 2152 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 01:59:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 347. [2022-11-03 01:59:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.4104046242774566) internal successors, (488), 346 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 488 transitions. [2022-11-03 01:59:05,277 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 488 transitions. Word has length 266 [2022-11-03 01:59:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:05,277 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 488 transitions. [2022-11-03 01:59:05,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 488 transitions. [2022-11-03 01:59:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:05,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:05,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:05,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:05,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:05,488 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -7986665, now seen corresponding path program 1 times [2022-11-03 01:59:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:05,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774207603] [2022-11-03 01:59:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:05,491 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:05,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:59:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:06,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:06,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:06,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:06,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774207603] [2022-11-03 01:59:06,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774207603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:06,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:06,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:06,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39591228] [2022-11-03 01:59:06,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:06,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:06,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:06,545 INFO L87 Difference]: Start difference. First operand 347 states and 488 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:06,825 INFO L93 Difference]: Finished difference Result 874 states and 1273 transitions. [2022-11-03 01:59:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:06,831 INFO L225 Difference]: With dead ends: 874 [2022-11-03 01:59:06,831 INFO L226 Difference]: Without dead ends: 611 [2022-11-03 01:59:06,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:06,833 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1416 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:06,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 1991 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-03 01:59:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 349. [2022-11-03 01:59:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4080459770114941) internal successors, (490), 348 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 490 transitions. [2022-11-03 01:59:06,840 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 490 transitions. Word has length 266 [2022-11-03 01:59:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:06,840 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 490 transitions. [2022-11-03 01:59:06,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 490 transitions. [2022-11-03 01:59:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:06,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:06,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:06,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 01:59:07,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:07,065 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1765613803, now seen corresponding path program 1 times [2022-11-03 01:59:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:07,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468248875] [2022-11-03 01:59:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:07,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:07,067 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:07,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:59:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:59:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:08,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:08,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468248875] [2022-11-03 01:59:08,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468248875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:08,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:08,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374105781] [2022-11-03 01:59:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:08,139 INFO L87 Difference]: Start difference. First operand 349 states and 490 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:08,990 INFO L93 Difference]: Finished difference Result 1072 states and 1566 transitions. [2022-11-03 01:59:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:08,993 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 01:59:08,993 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:59:08,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:08,994 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1678 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:08,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 2462 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:59:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:59:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 351. [2022-11-03 01:59:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.4057142857142857) internal successors, (492), 350 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 492 transitions. [2022-11-03 01:59:09,003 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 492 transitions. Word has length 266 [2022-11-03 01:59:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:09,003 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 492 transitions. [2022-11-03 01:59:09,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 492 transitions. [2022-11-03 01:59:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:09,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:09,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:09,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:09,208 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:09,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1713306263, now seen corresponding path program 1 times [2022-11-03 01:59:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211677097] [2022-11-03 01:59:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:09,211 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:59:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:10,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:10,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:10,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211677097] [2022-11-03 01:59:10,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211677097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:10,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:10,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:10,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772479030] [2022-11-03 01:59:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:10,176 INFO L87 Difference]: Start difference. First operand 351 states and 492 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:10,447 INFO L93 Difference]: Finished difference Result 1060 states and 1547 transitions. [2022-11-03 01:59:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:10,462 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:59:10,464 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:10,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:10,466 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 1650 mSDsluCounter, 2307 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 2778 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 2778 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 353. [2022-11-03 01:59:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.4034090909090908) internal successors, (494), 352 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 494 transitions. [2022-11-03 01:59:10,485 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 494 transitions. Word has length 266 [2022-11-03 01:59:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:10,486 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 494 transitions. [2022-11-03 01:59:10,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 494 transitions. [2022-11-03 01:59:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:10,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:10,489 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:10,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:10,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:10,705 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -982511975, now seen corresponding path program 1 times [2022-11-03 01:59:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18649565] [2022-11-03 01:59:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:10,708 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:10,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:59:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:11,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:11,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:11,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18649565] [2022-11-03 01:59:11,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18649565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:11,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:11,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:11,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145232237] [2022-11-03 01:59:11,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:11,829 INFO L87 Difference]: Start difference. First operand 353 states and 494 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:12,078 INFO L93 Difference]: Finished difference Result 1134 states and 1657 transitions. [2022-11-03 01:59:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:12,083 INFO L225 Difference]: With dead ends: 1134 [2022-11-03 01:59:12,084 INFO L226 Difference]: Without dead ends: 871 [2022-11-03 01:59:12,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:12,085 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1424 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:12,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 2232 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-11-03 01:59:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 355. [2022-11-03 01:59:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4011299435028248) internal successors, (496), 354 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 496 transitions. [2022-11-03 01:59:12,094 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 496 transitions. Word has length 266 [2022-11-03 01:59:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:12,095 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 496 transitions. [2022-11-03 01:59:12,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 496 transitions. [2022-11-03 01:59:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:12,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:12,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:12,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 01:59:12,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:12,312 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -962970853, now seen corresponding path program 1 times [2022-11-03 01:59:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:12,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321310629] [2022-11-03 01:59:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:12,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:12,315 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:12,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:59:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:13,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:13,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321310629] [2022-11-03 01:59:13,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321310629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:13,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:59:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403514193] [2022-11-03 01:59:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:13,631 INFO L87 Difference]: Start difference. First operand 355 states and 496 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:13,828 INFO L93 Difference]: Finished difference Result 1051 states and 1534 transitions. [2022-11-03 01:59:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:13,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:13,831 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 01:59:13,831 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 01:59:13,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 01:59:13,832 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 908 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:13,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1494 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 01:59:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 357. [2022-11-03 01:59:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.398876404494382) internal successors, (498), 356 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 498 transitions. [2022-11-03 01:59:13,841 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 498 transitions. Word has length 266 [2022-11-03 01:59:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:13,842 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 498 transitions. [2022-11-03 01:59:13,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 498 transitions. [2022-11-03 01:59:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:13,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:13,844 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:13,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:14,049 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash -435576803, now seen corresponding path program 1 times [2022-11-03 01:59:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:14,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330246591] [2022-11-03 01:59:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:14,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:14,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:14,051 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:14,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:59:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:15,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:15,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:15,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330246591] [2022-11-03 01:59:15,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330246591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:15,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154758432] [2022-11-03 01:59:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:15,010 INFO L87 Difference]: Start difference. First operand 357 states and 498 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:15,258 INFO L93 Difference]: Finished difference Result 1060 states and 1544 transitions. [2022-11-03 01:59:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:15,260 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 01:59:15,260 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:15,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:15,261 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1626 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:15,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1626 Valid, 2757 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 359. [2022-11-03 01:59:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3966480446927374) internal successors, (500), 358 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 500 transitions. [2022-11-03 01:59:15,266 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 500 transitions. Word has length 266 [2022-11-03 01:59:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:15,266 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 500 transitions. [2022-11-03 01:59:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 500 transitions. [2022-11-03 01:59:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:15,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:15,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:15,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:15,469 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 213015967, now seen corresponding path program 1 times [2022-11-03 01:59:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:15,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032093169] [2022-11-03 01:59:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:15,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:15,472 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:15,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:59:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:16,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:16,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:16,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032093169] [2022-11-03 01:59:16,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032093169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:16,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:16,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:16,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325271786] [2022-11-03 01:59:16,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:16,747 INFO L87 Difference]: Start difference. First operand 359 states and 500 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:16,972 INFO L93 Difference]: Finished difference Result 1144 states and 1669 transitions. [2022-11-03 01:59:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:16,974 INFO L225 Difference]: With dead ends: 1144 [2022-11-03 01:59:16,975 INFO L226 Difference]: Without dead ends: 881 [2022-11-03 01:59:16,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:16,977 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1423 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:16,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 2234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-03 01:59:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 361. [2022-11-03 01:59:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3944444444444444) internal successors, (502), 360 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 502 transitions. [2022-11-03 01:59:16,988 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 502 transitions. Word has length 266 [2022-11-03 01:59:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:16,988 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 502 transitions. [2022-11-03 01:59:16,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 502 transitions. [2022-11-03 01:59:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:16,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:16,990 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:17,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 01:59:17,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:17,205 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 303076257, now seen corresponding path program 1 times [2022-11-03 01:59:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313012742] [2022-11-03 01:59:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:17,208 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:17,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:59:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:18,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:18,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:18,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313012742] [2022-11-03 01:59:18,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313012742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:18,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:18,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:59:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175379078] [2022-11-03 01:59:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:59:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:59:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:59:18,302 INFO L87 Difference]: Start difference. First operand 361 states and 502 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:19,188 INFO L93 Difference]: Finished difference Result 1714 states and 2514 transitions. [2022-11-03 01:59:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:59:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:19,191 INFO L225 Difference]: With dead ends: 1714 [2022-11-03 01:59:19,191 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 01:59:19,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 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 01:59:19,193 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 3510 mSDsluCounter, 5112 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 5608 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:19,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 5608 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 01:59:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 379. [2022-11-03 01:59:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.3968253968253967) internal successors, (528), 378 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 01:59:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 528 transitions. [2022-11-03 01:59:19,208 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 528 transitions. Word has length 266 [2022-11-03 01:59:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:19,209 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 528 transitions. [2022-11-03 01:59:19,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 528 transitions. [2022-11-03 01:59:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:19,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:19,211 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:19,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 01:59:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:19,425 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1104649693, now seen corresponding path program 1 times [2022-11-03 01:59:19,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:19,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471035625] [2022-11-03 01:59:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:19,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:19,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:19,428 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:19,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:59:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:20,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:20,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471035625] [2022-11-03 01:59:20,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471035625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:20,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:20,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:20,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844528615] [2022-11-03 01:59:20,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:20,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:20,778 INFO L87 Difference]: Start difference. First operand 379 states and 528 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:21,084 INFO L93 Difference]: Finished difference Result 1209 states and 1761 transitions. [2022-11-03 01:59:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:21,086 INFO L225 Difference]: With dead ends: 1209 [2022-11-03 01:59:21,086 INFO L226 Difference]: Without dead ends: 928 [2022-11-03 01:59:21,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:21,087 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1407 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:21,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2245 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-03 01:59:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 383. [2022-11-03 01:59:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3926701570680629) internal successors, (532), 382 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 01:59:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 532 transitions. [2022-11-03 01:59:21,098 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 532 transitions. Word has length 266 [2022-11-03 01:59:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:21,099 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 532 transitions. [2022-11-03 01:59:21,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 532 transitions. [2022-11-03 01:59:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:21,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:21,101 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:21,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:59:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:21,313 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1267067173, now seen corresponding path program 1 times [2022-11-03 01:59:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:21,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689931774] [2022-11-03 01:59:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:21,316 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:21,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 01:59:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:22,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:22,463 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:22,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689931774] [2022-11-03 01:59:22,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689931774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:22,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:22,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888125927] [2022-11-03 01:59:22,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:22,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:22,465 INFO L87 Difference]: Start difference. First operand 383 states and 532 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:22,674 INFO L93 Difference]: Finished difference Result 1224 states and 1782 transitions. [2022-11-03 01:59:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:22,677 INFO L225 Difference]: With dead ends: 1224 [2022-11-03 01:59:22,677 INFO L226 Difference]: Without dead ends: 943 [2022-11-03 01:59:22,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:22,678 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 1413 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:22,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2230 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-03 01:59:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 387. [2022-11-03 01:59:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3911917098445596) internal successors, (537), 386 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 537 transitions. [2022-11-03 01:59:22,688 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 537 transitions. Word has length 266 [2022-11-03 01:59:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:22,688 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 537 transitions. [2022-11-03 01:59:22,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 537 transitions. [2022-11-03 01:59:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:22,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:22,690 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:22,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 01:59:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:22,901 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1624030937, now seen corresponding path program 1 times [2022-11-03 01:59:22,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:22,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608075693] [2022-11-03 01:59:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:22,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:22,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:22,905 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:22,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:59:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:23,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:23,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608075693] [2022-11-03 01:59:23,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608075693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:23,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:23,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:59:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980899451] [2022-11-03 01:59:23,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:59:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:59:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:59:23,955 INFO L87 Difference]: Start difference. First operand 387 states and 537 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:24,795 INFO L93 Difference]: Finished difference Result 1748 states and 2559 transitions. [2022-11-03 01:59:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:59:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:24,798 INFO L225 Difference]: With dead ends: 1748 [2022-11-03 01:59:24,798 INFO L226 Difference]: Without dead ends: 1467 [2022-11-03 01:59:24,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 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 01:59:24,800 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 4141 mSDsluCounter, 5115 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:24,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4141 Valid, 5633 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-11-03 01:59:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 395. [2022-11-03 01:59:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.3908629441624365) internal successors, (548), 394 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 548 transitions. [2022-11-03 01:59:24,812 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 548 transitions. Word has length 266 [2022-11-03 01:59:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:24,813 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 548 transitions. [2022-11-03 01:59:24,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 548 transitions. [2022-11-03 01:59:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:24,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:24,815 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:24,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:25,029 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash -956649047, now seen corresponding path program 1 times [2022-11-03 01:59:25,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:25,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214429786] [2022-11-03 01:59:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:25,032 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:25,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:59:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:25,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:26,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:26,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214429786] [2022-11-03 01:59:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214429786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:26,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:26,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771142672] [2022-11-03 01:59:26,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:26,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:26,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:26,147 INFO L87 Difference]: Start difference. First operand 395 states and 548 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:26,418 INFO L93 Difference]: Finished difference Result 1204 states and 1748 transitions. [2022-11-03 01:59:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:26,420 INFO L225 Difference]: With dead ends: 1204 [2022-11-03 01:59:26,420 INFO L226 Difference]: Without dead ends: 915 [2022-11-03 01:59:26,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:26,421 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 1694 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:26,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 2823 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-03 01:59:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 399. [2022-11-03 01:59:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.3869346733668342) internal successors, (552), 398 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2022-11-03 01:59:26,431 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 266 [2022-11-03 01:59:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:26,432 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2022-11-03 01:59:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2022-11-03 01:59:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:26,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:26,434 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:26,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:26,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:26,648 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -611820885, now seen corresponding path program 1 times [2022-11-03 01:59:26,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055323746] [2022-11-03 01:59:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:26,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:26,651 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:26,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:59:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:59:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:27,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:27,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055323746] [2022-11-03 01:59:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055323746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:27,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:27,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:27,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971480497] [2022-11-03 01:59:27,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:27,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:27,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:27,771 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:28,635 INFO L93 Difference]: Finished difference Result 1150 states and 1666 transitions. [2022-11-03 01:59:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:28,639 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 01:59:28,639 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:59:28,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:28,640 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1585 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:28,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 2382 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:59:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:59:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 401. [2022-11-03 01:59:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.385) internal successors, (554), 400 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 554 transitions. [2022-11-03 01:59:28,653 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 554 transitions. Word has length 266 [2022-11-03 01:59:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:28,654 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 554 transitions. [2022-11-03 01:59:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 554 transitions. [2022-11-03 01:59:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:28,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:28,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:28,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:28,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:28,881 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1913674797, now seen corresponding path program 1 times [2022-11-03 01:59:28,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:28,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022850209] [2022-11-03 01:59:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:28,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:28,885 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:28,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:59:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:29,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:29,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022850209] [2022-11-03 01:59:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022850209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:29,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:29,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441067930] [2022-11-03 01:59:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:29,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:29,920 INFO L87 Difference]: Start difference. First operand 401 states and 554 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:30,156 INFO L93 Difference]: Finished difference Result 1138 states and 1647 transitions. [2022-11-03 01:59:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:30,159 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 01:59:30,159 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 01:59:30,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:30,160 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1557 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:30,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1557 Valid, 2695 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 01:59:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 403. [2022-11-03 01:59:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3830845771144278) internal successors, (556), 402 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 556 transitions. [2022-11-03 01:59:30,181 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 556 transitions. Word has length 266 [2022-11-03 01:59:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:30,183 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 556 transitions. [2022-11-03 01:59:30,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 556 transitions. [2022-11-03 01:59:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:30,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:30,185 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:30,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:30,401 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 508483119, now seen corresponding path program 1 times [2022-11-03 01:59:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501904184] [2022-11-03 01:59:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:30,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:30,403 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:59:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:31,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:31,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:31,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501904184] [2022-11-03 01:59:31,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501904184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:31,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:31,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352989271] [2022-11-03 01:59:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:31,601 INFO L87 Difference]: Start difference. First operand 403 states and 556 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:31,834 INFO L93 Difference]: Finished difference Result 1264 states and 1833 transitions. [2022-11-03 01:59:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:31,837 INFO L225 Difference]: With dead ends: 1264 [2022-11-03 01:59:31,837 INFO L226 Difference]: Without dead ends: 975 [2022-11-03 01:59:31,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:31,838 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1393 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:31,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2221 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-03 01:59:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 405. [2022-11-03 01:59:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.381188118811881) internal successors, (558), 404 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 558 transitions. [2022-11-03 01:59:31,848 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 558 transitions. Word has length 266 [2022-11-03 01:59:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:31,848 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 558 transitions. [2022-11-03 01:59:31,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 558 transitions. [2022-11-03 01:59:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:31,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:31,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:31,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:32,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:32,061 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1955063985, now seen corresponding path program 1 times [2022-11-03 01:59:32,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123635910] [2022-11-03 01:59:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:32,064 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:32,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:59:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:59:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:33,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:33,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123635910] [2022-11-03 01:59:33,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123635910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:33,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:33,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347069348] [2022-11-03 01:59:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:33,161 INFO L87 Difference]: Start difference. First operand 405 states and 558 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:33,965 INFO L93 Difference]: Finished difference Result 1150 states and 1663 transitions. [2022-11-03 01:59:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:33,967 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 01:59:33,967 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 01:59:33,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:33,968 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1551 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:33,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 2350 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:59:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 01:59:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 411. [2022-11-03 01:59:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.3804878048780487) internal successors, (566), 410 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2022-11-03 01:59:33,978 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 266 [2022-11-03 01:59:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2022-11-03 01:59:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2022-11-03 01:59:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:33,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:33,981 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:34,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:34,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:34,197 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash -442923853, now seen corresponding path program 1 times [2022-11-03 01:59:34,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:34,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726903296] [2022-11-03 01:59:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:34,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:34,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:34,200 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:34,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:59:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:35,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:35,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726903296] [2022-11-03 01:59:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726903296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:35,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:35,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101738102] [2022-11-03 01:59:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:35,191 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:35,423 INFO L93 Difference]: Finished difference Result 1138 states and 1644 transitions. [2022-11-03 01:59:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:35,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:35,425 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 01:59:35,425 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 01:59:35,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:35,425 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 1523 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:35,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2662 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 01:59:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 413. [2022-11-03 01:59:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3786407766990292) internal successors, (568), 412 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 568 transitions. [2022-11-03 01:59:35,432 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 568 transitions. Word has length 266 [2022-11-03 01:59:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:35,433 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 568 transitions. [2022-11-03 01:59:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 568 transitions. [2022-11-03 01:59:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:35,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:35,435 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:35,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:35,657 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -16369355, now seen corresponding path program 1 times [2022-11-03 01:59:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:35,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601548120] [2022-11-03 01:59:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:35,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:35,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:35,659 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:59:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:36,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:36,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:36,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601548120] [2022-11-03 01:59:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601548120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:36,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:36,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:36,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623238001] [2022-11-03 01:59:36,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:36,827 INFO L87 Difference]: Start difference. First operand 413 states and 568 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:37,067 INFO L93 Difference]: Finished difference Result 1272 states and 1842 transitions. [2022-11-03 01:59:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:37,069 INFO L225 Difference]: With dead ends: 1272 [2022-11-03 01:59:37,069 INFO L226 Difference]: Without dead ends: 983 [2022-11-03 01:59:37,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:37,070 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 1378 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:37,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2214 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-03 01:59:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 415. [2022-11-03 01:59:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.3768115942028984) internal successors, (570), 414 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 570 transitions. [2022-11-03 01:59:37,082 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 570 transitions. Word has length 266 [2022-11-03 01:59:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:37,083 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 570 transitions. [2022-11-03 01:59:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 570 transitions. [2022-11-03 01:59:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:37,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:37,085 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:37,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:37,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:37,305 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash -172349897, now seen corresponding path program 1 times [2022-11-03 01:59:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:37,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238841239] [2022-11-03 01:59:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:37,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:37,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:37,307 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:37,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:59:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:59:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:38,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:38,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238841239] [2022-11-03 01:59:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238841239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:38,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:38,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672518838] [2022-11-03 01:59:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:38,610 INFO L87 Difference]: Start difference. First operand 415 states and 570 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:38,850 INFO L93 Difference]: Finished difference Result 1233 states and 1784 transitions. [2022-11-03 01:59:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:38,852 INFO L225 Difference]: With dead ends: 1233 [2022-11-03 01:59:38,852 INFO L226 Difference]: Without dead ends: 944 [2022-11-03 01:59:38,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:38,853 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1322 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:38,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2196 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-03 01:59:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 417. [2022-11-03 01:59:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.375) internal successors, (572), 416 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2022-11-03 01:59:38,862 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 266 [2022-11-03 01:59:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:38,862 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2022-11-03 01:59:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2022-11-03 01:59:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:38,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:38,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:38,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 01:59:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:39,080 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1960219719, now seen corresponding path program 1 times [2022-11-03 01:59:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:39,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081720479] [2022-11-03 01:59:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:39,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:39,086 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:39,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:59:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:39,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:40,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:40,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:40,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081720479] [2022-11-03 01:59:40,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081720479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:40,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:40,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:40,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99970099] [2022-11-03 01:59:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:40,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:40,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:40,083 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:40,319 INFO L93 Difference]: Finished difference Result 1138 states and 1641 transitions. [2022-11-03 01:59:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:40,322 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 01:59:40,322 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 01:59:40,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 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 01:59:40,323 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1499 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:40,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 2641 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 01:59:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 419. [2022-11-03 01:59:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.3732057416267942) internal successors, (574), 418 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 574 transitions. [2022-11-03 01:59:40,334 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 574 transitions. Word has length 266 [2022-11-03 01:59:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:40,334 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 574 transitions. [2022-11-03 01:59:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 574 transitions. [2022-11-03 01:59:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:40,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:40,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:40,558 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1890571845, now seen corresponding path program 1 times [2022-11-03 01:59:40,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929677699] [2022-11-03 01:59:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:40,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:40,562 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:40,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 01:59:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:41,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:41,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929677699] [2022-11-03 01:59:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929677699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:41,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:41,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339637700] [2022-11-03 01:59:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:41,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:41,815 INFO L87 Difference]: Start difference. First operand 419 states and 574 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:42,033 INFO L93 Difference]: Finished difference Result 1282 states and 1854 transitions. [2022-11-03 01:59:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:42,035 INFO L225 Difference]: With dead ends: 1282 [2022-11-03 01:59:42,035 INFO L226 Difference]: Without dead ends: 993 [2022-11-03 01:59:42,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 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 01:59:42,036 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1375 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:42,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 2216 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-03 01:59:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 421. [2022-11-03 01:59:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 576 transitions. [2022-11-03 01:59:42,046 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 576 transitions. Word has length 266 [2022-11-03 01:59:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:42,046 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 576 transitions. [2022-11-03 01:59:42,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 576 transitions. [2022-11-03 01:59:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:42,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:42,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:42,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:42,256 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash -491618243, now seen corresponding path program 1 times [2022-11-03 01:59:42,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:42,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710938096] [2022-11-03 01:59:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:42,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:42,259 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:42,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:59:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:43,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:43,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:43,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710938096] [2022-11-03 01:59:43,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710938096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:43,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:43,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:59:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089795282] [2022-11-03 01:59:43,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:59:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:59:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:59:43,298 INFO L87 Difference]: Start difference. First operand 421 states and 576 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:44,094 INFO L93 Difference]: Finished difference Result 1808 states and 2635 transitions. [2022-11-03 01:59:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:59:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:44,097 INFO L225 Difference]: With dead ends: 1808 [2022-11-03 01:59:44,097 INFO L226 Difference]: Without dead ends: 1519 [2022-11-03 01:59:44,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 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 01:59:44,099 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 3546 mSDsluCounter, 5150 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 5770 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:44,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 5770 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-11-03 01:59:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 447. [2022-11-03 01:59:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3766816143497758) internal successors, (614), 446 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 614 transitions. [2022-11-03 01:59:44,110 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 614 transitions. Word has length 266 [2022-11-03 01:59:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:44,111 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 614 transitions. [2022-11-03 01:59:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 614 transitions. [2022-11-03 01:59:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:44,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:44,113 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:44,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:44,326 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -128151745, now seen corresponding path program 1 times [2022-11-03 01:59:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:44,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575383481] [2022-11-03 01:59:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:44,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:44,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:44,329 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:44,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 01:59:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:45,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:45,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575383481] [2022-11-03 01:59:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575383481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:45,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:45,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:59:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610879756] [2022-11-03 01:59:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:59:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:59:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:45,619 INFO L87 Difference]: Start difference. First operand 447 states and 614 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:47,280 INFO L93 Difference]: Finished difference Result 2040 states and 2968 transitions. [2022-11-03 01:59:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:59:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:47,284 INFO L225 Difference]: With dead ends: 2040 [2022-11-03 01:59:47,284 INFO L226 Difference]: Without dead ends: 1725 [2022-11-03 01:59:47,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 01:59:47,286 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 3319 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4235 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:47,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4235 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:59:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-11-03 01:59:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 507. [2022-11-03 01:59:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3853754940711462) internal successors, (701), 506 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 701 transitions. [2022-11-03 01:59:47,301 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 701 transitions. Word has length 266 [2022-11-03 01:59:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:47,301 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 701 transitions. [2022-11-03 01:59:47,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 701 transitions. [2022-11-03 01:59:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:47,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:47,303 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:47,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:47,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:47,525 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1076203711, now seen corresponding path program 1 times [2022-11-03 01:59:47,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653145574] [2022-11-03 01:59:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:47,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:47,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:47,530 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:47,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 01:59:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:48,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:48,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653145574] [2022-11-03 01:59:48,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653145574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:48,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:48,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:59:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144190630] [2022-11-03 01:59:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:59:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:59:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:48,861 INFO L87 Difference]: Start difference. First operand 507 states and 701 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:50,482 INFO L93 Difference]: Finished difference Result 2102 states and 3056 transitions. [2022-11-03 01:59:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:59:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:50,484 INFO L225 Difference]: With dead ends: 2102 [2022-11-03 01:59:50,484 INFO L226 Difference]: Without dead ends: 1727 [2022-11-03 01:59:50,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 01:59:50,485 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 3319 mSDsluCounter, 3717 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:50,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4240 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:59:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-03 01:59:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 509. [2022-11-03 01:59:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 508 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 703 transitions. [2022-11-03 01:59:50,497 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 703 transitions. Word has length 266 [2022-11-03 01:59:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:50,497 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 703 transitions. [2022-11-03 01:59:50,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 703 transitions. [2022-11-03 01:59:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:50,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:50,499 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:50,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:50,722 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1510709309, now seen corresponding path program 1 times [2022-11-03 01:59:50,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429378316] [2022-11-03 01:59:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:50,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:50,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:50,726 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:50,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:59:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:52,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:52,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:52,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429378316] [2022-11-03 01:59:52,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429378316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:52,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:52,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:59:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168852272] [2022-11-03 01:59:52,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:59:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:59:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:52,340 INFO L87 Difference]: Start difference. First operand 509 states and 703 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:54,123 INFO L93 Difference]: Finished difference Result 2106 states and 3059 transitions. [2022-11-03 01:59:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:59:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:54,125 INFO L225 Difference]: With dead ends: 2106 [2022-11-03 01:59:54,125 INFO L226 Difference]: Without dead ends: 1729 [2022-11-03 01:59:54,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 01:59:54,126 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 3319 mSDsluCounter, 3718 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:54,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4245 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 01:59:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-03 01:59:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 511. [2022-11-03 01:59:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3823529411764706) internal successors, (705), 510 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 705 transitions. [2022-11-03 01:59:54,140 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 705 transitions. Word has length 266 [2022-11-03 01:59:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:54,140 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 705 transitions. [2022-11-03 01:59:54,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 705 transitions. [2022-11-03 01:59:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:54,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:54,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:54,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:54,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:54,357 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2077661381, now seen corresponding path program 1 times [2022-11-03 01:59:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:54,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768418924] [2022-11-03 01:59:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:54,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:54,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:54,359 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:54,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 01:59:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:55,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:55,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:55,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768418924] [2022-11-03 01:59:55,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768418924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:55,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:55,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:59:55,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795848527] [2022-11-03 01:59:55,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:55,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:59:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:59:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:55,637 INFO L87 Difference]: Start difference. First operand 511 states and 705 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:57,370 INFO L93 Difference]: Finished difference Result 2110 states and 3062 transitions. [2022-11-03 01:59:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:59:57,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 01:59:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:57,372 INFO L225 Difference]: With dead ends: 2110 [2022-11-03 01:59:57,372 INFO L226 Difference]: Without dead ends: 1731 [2022-11-03 01:59:57,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 01:59:57,373 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 3319 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4250 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:57,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4250 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:59:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-11-03 01:59:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 513. [2022-11-03 01:59:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.380859375) internal successors, (707), 512 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 707 transitions. [2022-11-03 01:59:57,385 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 707 transitions. Word has length 266 [2022-11-03 01:59:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 707 transitions. [2022-11-03 01:59:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 707 transitions. [2022-11-03 01:59:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:59:57,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:57,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:57,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 01:59:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:57,600 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1355472313, now seen corresponding path program 1 times [2022-11-03 01:59:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:57,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978209810] [2022-11-03 01:59:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:57,603 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:59:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:58,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:58,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:58,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:58,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978209810] [2022-11-03 01:59:58,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978209810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:58,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:58,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:59:58,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564489956] [2022-11-03 01:59:58,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:58,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:59:58,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:58,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:59:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:59:58,902 INFO L87 Difference]: Start difference. First operand 513 states and 707 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:00,655 INFO L93 Difference]: Finished difference Result 2114 states and 3065 transitions. [2022-11-03 02:00:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:00,657 INFO L225 Difference]: With dead ends: 2114 [2022-11-03 02:00:00,657 INFO L226 Difference]: Without dead ends: 1733 [2022-11-03 02:00:00,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:00,659 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 3319 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4255 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:00,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4255 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:00:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-03 02:00:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 515. [2022-11-03 02:00:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3793774319066148) internal successors, (709), 514 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 709 transitions. [2022-11-03 02:00:00,673 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 709 transitions. Word has length 266 [2022-11-03 02:00:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:00,673 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 709 transitions. [2022-11-03 02:00:00,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 709 transitions. [2022-11-03 02:00:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:00,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:00,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:00,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 02:00:00,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:00,897 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash -867425207, now seen corresponding path program 1 times [2022-11-03 02:00:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:00,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451358503] [2022-11-03 02:00:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:00,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:00,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:00,902 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:00,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:00:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:02,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:02,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451358503] [2022-11-03 02:00:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451358503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:02,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:02,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433539516] [2022-11-03 02:00:02,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:02,274 INFO L87 Difference]: Start difference. First operand 515 states and 709 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:03,983 INFO L93 Difference]: Finished difference Result 2118 states and 3068 transitions. [2022-11-03 02:00:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:03,985 INFO L225 Difference]: With dead ends: 2118 [2022-11-03 02:00:03,985 INFO L226 Difference]: Without dead ends: 1735 [2022-11-03 02:00:03,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:03,987 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 3319 mSDsluCounter, 3721 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:03,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4260 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:00:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-11-03 02:00:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 517. [2022-11-03 02:00:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.377906976744186) internal successors, (711), 516 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 711 transitions. [2022-11-03 02:00:04,002 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 711 transitions. Word has length 266 [2022-11-03 02:00:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:04,002 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 711 transitions. [2022-11-03 02:00:04,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 711 transitions. [2022-11-03 02:00:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:04,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:04,004 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:04,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:04,220 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2145369803, now seen corresponding path program 1 times [2022-11-03 02:00:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:04,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671450579] [2022-11-03 02:00:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:04,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:04,224 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:04,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:00:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:05,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:05,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671450579] [2022-11-03 02:00:05,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671450579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:05,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:05,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:05,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719284595] [2022-11-03 02:00:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:05,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:05,649 INFO L87 Difference]: Start difference. First operand 517 states and 711 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:07,393 INFO L93 Difference]: Finished difference Result 2124 states and 3074 transitions. [2022-11-03 02:00:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:07,394 INFO L225 Difference]: With dead ends: 2124 [2022-11-03 02:00:07,394 INFO L226 Difference]: Without dead ends: 1739 [2022-11-03 02:00:07,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:07,395 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 3323 mSDsluCounter, 3726 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4275 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:07,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4275 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:00:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-11-03 02:00:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 521. [2022-11-03 02:00:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.376923076923077) internal successors, (716), 520 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 716 transitions. [2022-11-03 02:00:07,404 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 716 transitions. Word has length 266 [2022-11-03 02:00:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:07,404 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 716 transitions. [2022-11-03 02:00:07,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 716 transitions. [2022-11-03 02:00:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:07,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:07,405 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:07,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:00:07,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:07,606 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash -220665267, now seen corresponding path program 1 times [2022-11-03 02:00:07,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705915103] [2022-11-03 02:00:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:07,609 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:07,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:00:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:08,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:08,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705915103] [2022-11-03 02:00:08,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705915103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:08,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:08,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:08,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388928262] [2022-11-03 02:00:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:08,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:08,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:08,949 INFO L87 Difference]: Start difference. First operand 521 states and 716 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:10,706 INFO L93 Difference]: Finished difference Result 2130 states and 3080 transitions. [2022-11-03 02:00:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:10,707 INFO L225 Difference]: With dead ends: 2130 [2022-11-03 02:00:10,707 INFO L226 Difference]: Without dead ends: 1741 [2022-11-03 02:00:10,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:10,708 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 3323 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4280 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4280 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:00:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-03 02:00:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 523. [2022-11-03 02:00:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3754789272030652) internal successors, (718), 522 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 718 transitions. [2022-11-03 02:00:10,716 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 718 transitions. Word has length 266 [2022-11-03 02:00:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:10,716 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 718 transitions. [2022-11-03 02:00:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 718 transitions. [2022-11-03 02:00:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:10,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:10,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:10,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:10,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:10,918 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:10,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1506479695, now seen corresponding path program 1 times [2022-11-03 02:00:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:10,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857376547] [2022-11-03 02:00:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:10,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:10,926 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:10,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:00:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:12,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:12,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857376547] [2022-11-03 02:00:12,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857376547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:12,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:12,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029149877] [2022-11-03 02:00:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:12,294 INFO L87 Difference]: Start difference. First operand 523 states and 718 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:13,980 INFO L93 Difference]: Finished difference Result 2134 states and 3083 transitions. [2022-11-03 02:00:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:13,981 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 02:00:13,981 INFO L226 Difference]: Without dead ends: 1743 [2022-11-03 02:00:13,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:13,982 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 3323 mSDsluCounter, 3728 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4285 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:13,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4285 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:00:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-11-03 02:00:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 525. [2022-11-03 02:00:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3740458015267176) internal successors, (720), 524 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 720 transitions. [2022-11-03 02:00:13,993 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 720 transitions. Word has length 266 [2022-11-03 02:00:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:13,993 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 720 transitions. [2022-11-03 02:00:13,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 720 transitions. [2022-11-03 02:00:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:13,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:13,995 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:14,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:14,195 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -140883247, now seen corresponding path program 1 times [2022-11-03 02:00:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:14,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235757259] [2022-11-03 02:00:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:14,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:14,199 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:14,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:00:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:14,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:15,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:15,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235757259] [2022-11-03 02:00:15,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235757259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:15,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:15,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:15,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414731933] [2022-11-03 02:00:15,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:15,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:15,596 INFO L87 Difference]: Start difference. First operand 525 states and 720 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:17,381 INFO L93 Difference]: Finished difference Result 2138 states and 3086 transitions. [2022-11-03 02:00:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:17,383 INFO L225 Difference]: With dead ends: 2138 [2022-11-03 02:00:17,384 INFO L226 Difference]: Without dead ends: 1745 [2022-11-03 02:00:17,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:17,385 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 3323 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4290 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:17,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4290 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:00:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-11-03 02:00:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 527. [2022-11-03 02:00:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3726235741444868) internal successors, (722), 526 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 722 transitions. [2022-11-03 02:00:17,400 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 722 transitions. Word has length 266 [2022-11-03 02:00:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:17,400 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 722 transitions. [2022-11-03 02:00:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 722 transitions. [2022-11-03 02:00:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:17,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:17,402 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:17,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:17,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:17,625 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1179467821, now seen corresponding path program 1 times [2022-11-03 02:00:17,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741203026] [2022-11-03 02:00:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:17,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:17,627 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:17,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:00:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:18,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:18,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:18,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741203026] [2022-11-03 02:00:18,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741203026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:18,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:18,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:18,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365061193] [2022-11-03 02:00:18,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:18,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:18,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:18,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:18,958 INFO L87 Difference]: Start difference. First operand 527 states and 722 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:20,811 INFO L93 Difference]: Finished difference Result 2142 states and 3089 transitions. [2022-11-03 02:00:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:20,813 INFO L225 Difference]: With dead ends: 2142 [2022-11-03 02:00:20,813 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 02:00:20,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:20,814 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 3323 mSDsluCounter, 3730 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4295 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:20,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4295 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:00:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 02:00:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 529. [2022-11-03 02:00:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.371212121212121) internal successors, (724), 528 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 724 transitions. [2022-11-03 02:00:20,831 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 724 transitions. Word has length 266 [2022-11-03 02:00:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:20,832 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 724 transitions. [2022-11-03 02:00:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 724 transitions. [2022-11-03 02:00:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:20,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:20,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:20,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:00:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:21,049 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash 973638997, now seen corresponding path program 1 times [2022-11-03 02:00:21,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:21,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514794939] [2022-11-03 02:00:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:21,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:21,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:21,051 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:21,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:00:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:21,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:22,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:22,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:22,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514794939] [2022-11-03 02:00:22,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514794939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:22,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:22,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:22,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693144377] [2022-11-03 02:00:22,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:22,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:22,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:22,414 INFO L87 Difference]: Start difference. First operand 529 states and 724 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:24,178 INFO L93 Difference]: Finished difference Result 2146 states and 3092 transitions. [2022-11-03 02:00:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:24,179 INFO L225 Difference]: With dead ends: 2146 [2022-11-03 02:00:24,179 INFO L226 Difference]: Without dead ends: 1749 [2022-11-03 02:00:24,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:24,180 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 3323 mSDsluCounter, 3731 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:24,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4300 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:00:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-11-03 02:00:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 531. [2022-11-03 02:00:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.369811320754717) internal successors, (726), 530 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 726 transitions. [2022-11-03 02:00:24,192 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 726 transitions. Word has length 266 [2022-11-03 02:00:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:24,192 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 726 transitions. [2022-11-03 02:00:24,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 726 transitions. [2022-11-03 02:00:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:24,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:24,193 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:24,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:24,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:24,397 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1092080471, now seen corresponding path program 1 times [2022-11-03 02:00:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184405308] [2022-11-03 02:00:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:24,400 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:24,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:00:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:25,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:25,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:25,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184405308] [2022-11-03 02:00:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184405308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:25,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718702511] [2022-11-03 02:00:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:25,744 INFO L87 Difference]: Start difference. First operand 531 states and 726 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:27,432 INFO L93 Difference]: Finished difference Result 2150 states and 3095 transitions. [2022-11-03 02:00:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:27,434 INFO L225 Difference]: With dead ends: 2150 [2022-11-03 02:00:27,434 INFO L226 Difference]: Without dead ends: 1751 [2022-11-03 02:00:27,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:27,435 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 3323 mSDsluCounter, 3732 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4305 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:27,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4305 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:00:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-11-03 02:00:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 533. [2022-11-03 02:00:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.368421052631579) internal successors, (728), 532 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 728 transitions. [2022-11-03 02:00:27,447 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 728 transitions. Word has length 266 [2022-11-03 02:00:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:27,447 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 728 transitions. [2022-11-03 02:00:27,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 728 transitions. [2022-11-03 02:00:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:27,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:27,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:27,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 02:00:27,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:27,673 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash -941313575, now seen corresponding path program 1 times [2022-11-03 02:00:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691180229] [2022-11-03 02:00:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:27,676 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:27,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:00:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:29,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:29,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691180229] [2022-11-03 02:00:29,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691180229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:29,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:29,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:00:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087209061] [2022-11-03 02:00:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:29,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:00:29,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:00:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:29,082 INFO L87 Difference]: Start difference. First operand 533 states and 728 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:30,809 INFO L93 Difference]: Finished difference Result 2154 states and 3098 transitions. [2022-11-03 02:00:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:30,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:30,810 INFO L225 Difference]: With dead ends: 2154 [2022-11-03 02:00:30,810 INFO L226 Difference]: Without dead ends: 1753 [2022-11-03 02:00:30,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 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 02:00:30,811 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 3323 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4310 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:30,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4310 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:00:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-03 02:00:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 535. [2022-11-03 02:00:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.3670411985018727) internal successors, (730), 534 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 730 transitions. [2022-11-03 02:00:30,822 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 730 transitions. Word has length 266 [2022-11-03 02:00:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:30,823 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 730 transitions. [2022-11-03 02:00:30,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 730 transitions. [2022-11-03 02:00:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:30,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:30,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:30,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 02:00:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:31,025 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2046511323, now seen corresponding path program 1 times [2022-11-03 02:00:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340328244] [2022-11-03 02:00:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:31,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:31,027 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:31,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:00:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:32,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:32,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:32,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340328244] [2022-11-03 02:00:32,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340328244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:32,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:32,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963176265] [2022-11-03 02:00:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:32,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:32,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:32,401 INFO L87 Difference]: Start difference. First operand 535 states and 730 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:34,593 INFO L93 Difference]: Finished difference Result 2294 states and 3304 transitions. [2022-11-03 02:00:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:34,595 INFO L225 Difference]: With dead ends: 2294 [2022-11-03 02:00:34,595 INFO L226 Difference]: Without dead ends: 1891 [2022-11-03 02:00:34,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:34,595 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 3740 mSDsluCounter, 5014 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:34,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5601 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:00:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-03 02:00:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 539. [2022-11-03 02:00:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.3661710037174721) internal successors, (735), 538 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 735 transitions. [2022-11-03 02:00:34,604 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 735 transitions. Word has length 266 [2022-11-03 02:00:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:34,604 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 735 transitions. [2022-11-03 02:00:34,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 735 transitions. [2022-11-03 02:00:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:34,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:34,606 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:34,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:00:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:34,806 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash -647384867, now seen corresponding path program 1 times [2022-11-03 02:00:34,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:34,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143217022] [2022-11-03 02:00:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:34,809 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:34,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:00:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:35,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:36,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:36,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143217022] [2022-11-03 02:00:36,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143217022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:36,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:36,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598941592] [2022-11-03 02:00:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:36,171 INFO L87 Difference]: Start difference. First operand 539 states and 735 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:38,273 INFO L93 Difference]: Finished difference Result 2306 states and 3318 transitions. [2022-11-03 02:00:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:38,275 INFO L225 Difference]: With dead ends: 2306 [2022-11-03 02:00:38,275 INFO L226 Difference]: Without dead ends: 1899 [2022-11-03 02:00:38,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:00:38,276 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 3743 mSDsluCounter, 5015 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:38,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5606 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:00:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-03 02:00:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 541. [2022-11-03 02:00:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.364814814814815) internal successors, (737), 540 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 737 transitions. [2022-11-03 02:00:38,288 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 737 transitions. Word has length 266 [2022-11-03 02:00:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:38,289 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 737 transitions. [2022-11-03 02:00:38,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 737 transitions. [2022-11-03 02:00:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:38,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:38,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:38,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 02:00:38,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:38,491 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:38,491 INFO L85 PathProgramCache]: Analyzing trace with hash 704000351, now seen corresponding path program 1 times [2022-11-03 02:00:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527954689] [2022-11-03 02:00:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:38,494 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:38,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:00:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:39,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:39,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:39,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527954689] [2022-11-03 02:00:39,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527954689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:39,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:39,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564457142] [2022-11-03 02:00:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:39,919 INFO L87 Difference]: Start difference. First operand 541 states and 737 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:42,050 INFO L93 Difference]: Finished difference Result 2316 states and 3329 transitions. [2022-11-03 02:00:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:42,052 INFO L225 Difference]: With dead ends: 2316 [2022-11-03 02:00:42,053 INFO L226 Difference]: Without dead ends: 1907 [2022-11-03 02:00:42,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:00:42,054 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 3746 mSDsluCounter, 5016 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5611 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:42,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5611 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:00:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-11-03 02:00:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 543. [2022-11-03 02:00:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.363468634686347) internal successors, (739), 542 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 739 transitions. [2022-11-03 02:00:42,073 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 739 transitions. Word has length 266 [2022-11-03 02:00:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:42,073 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 739 transitions. [2022-11-03 02:00:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 739 transitions. [2022-11-03 02:00:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:42,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:42,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:42,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:42,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:42,291 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -179508639, now seen corresponding path program 1 times [2022-11-03 02:00:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697459950] [2022-11-03 02:00:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:42,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:42,294 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:42,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:00:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:43,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:43,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:43,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697459950] [2022-11-03 02:00:43,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697459950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:43,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:43,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611906087] [2022-11-03 02:00:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:43,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:43,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:43,743 INFO L87 Difference]: Start difference. First operand 543 states and 739 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:45,908 INFO L93 Difference]: Finished difference Result 2326 states and 3340 transitions. [2022-11-03 02:00:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:45,910 INFO L225 Difference]: With dead ends: 2326 [2022-11-03 02:00:45,910 INFO L226 Difference]: Without dead ends: 1915 [2022-11-03 02:00:45,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:45,912 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 3749 mSDsluCounter, 5017 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5616 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:45,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5616 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:00:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2022-11-03 02:00:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 545. [2022-11-03 02:00:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.3621323529411764) internal successors, (741), 544 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 741 transitions. [2022-11-03 02:00:45,925 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 741 transitions. Word has length 266 [2022-11-03 02:00:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:45,925 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 741 transitions. [2022-11-03 02:00:45,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 741 transitions. [2022-11-03 02:00:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:45,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:45,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:45,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:00:46,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:46,127 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2120090653, now seen corresponding path program 1 times [2022-11-03 02:00:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:46,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381212877] [2022-11-03 02:00:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:46,130 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:46,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:00:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:47,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:47,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381212877] [2022-11-03 02:00:47,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381212877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:47,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:47,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705876884] [2022-11-03 02:00:47,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:47,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:47,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:47,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:47,529 INFO L87 Difference]: Start difference. First operand 545 states and 741 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:49,697 INFO L93 Difference]: Finished difference Result 2336 states and 3351 transitions. [2022-11-03 02:00:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:49,699 INFO L225 Difference]: With dead ends: 2336 [2022-11-03 02:00:49,699 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 02:00:49,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:00:49,700 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 3752 mSDsluCounter, 5018 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 5621 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:49,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3752 Valid, 5621 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:00:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 02:00:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 547. [2022-11-03 02:00:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3608058608058609) internal successors, (743), 546 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 743 transitions. [2022-11-03 02:00:49,712 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 743 transitions. Word has length 266 [2022-11-03 02:00:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 743 transitions. [2022-11-03 02:00:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 743 transitions. [2022-11-03 02:00:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:49,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:49,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:49,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 02:00:49,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:49,914 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:49,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1404143077, now seen corresponding path program 1 times [2022-11-03 02:00:49,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092042046] [2022-11-03 02:00:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:49,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:49,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:49,918 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:49,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:00:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:51,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:51,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092042046] [2022-11-03 02:00:51,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092042046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:51,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:51,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772821178] [2022-11-03 02:00:51,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:51,335 INFO L87 Difference]: Start difference. First operand 547 states and 743 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:53,442 INFO L93 Difference]: Finished difference Result 2346 states and 3362 transitions. [2022-11-03 02:00:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:53,443 INFO L225 Difference]: With dead ends: 2346 [2022-11-03 02:00:53,444 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 02:00:53,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:53,444 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 3755 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 5626 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:53,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 5626 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:00:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 02:00:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 549. [2022-11-03 02:00:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3594890510948905) internal successors, (745), 548 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 745 transitions. [2022-11-03 02:00:53,454 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 745 transitions. Word has length 266 [2022-11-03 02:00:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:53,454 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 745 transitions. [2022-11-03 02:00:53,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 745 transitions. [2022-11-03 02:00:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:53,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:53,455 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:53,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 02:00:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:53,656 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 817866855, now seen corresponding path program 1 times [2022-11-03 02:00:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:53,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951279693] [2022-11-03 02:00:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:53,659 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:53,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:00:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:55,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:55,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:55,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951279693] [2022-11-03 02:00:55,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951279693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:55,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:55,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93325090] [2022-11-03 02:00:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:55,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:55,083 INFO L87 Difference]: Start difference. First operand 549 states and 745 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:57,247 INFO L93 Difference]: Finished difference Result 2364 states and 3385 transitions. [2022-11-03 02:00:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:00:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:57,249 INFO L225 Difference]: With dead ends: 2364 [2022-11-03 02:00:57,249 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 02:00:57,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:57,250 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 3765 mSDsluCounter, 5024 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:57,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5641 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:00:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 02:00:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 553. [2022-11-03 02:00:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.358695652173913) internal successors, (750), 552 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 750 transitions. [2022-11-03 02:00:57,264 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 750 transitions. Word has length 266 [2022-11-03 02:00:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:57,264 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 750 transitions. [2022-11-03 02:00:57,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 750 transitions. [2022-11-03 02:00:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:00:57,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:57,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:57,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:57,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:57,469 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2142723049, now seen corresponding path program 1 times [2022-11-03 02:00:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:57,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340550399] [2022-11-03 02:00:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:57,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:57,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:57,471 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:57,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:00:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:00:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:58,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:00:58,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340550399] [2022-11-03 02:00:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340550399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:58,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:58,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:00:58,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413265269] [2022-11-03 02:00:58,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:58,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:00:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:00:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:00:58,910 INFO L87 Difference]: Start difference. First operand 553 states and 750 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:01,113 INFO L93 Difference]: Finished difference Result 2376 states and 3399 transitions. [2022-11-03 02:01:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:01,115 INFO L225 Difference]: With dead ends: 2376 [2022-11-03 02:01:01,116 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:01:01,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:01,117 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 3768 mSDsluCounter, 5025 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:01,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5646 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:01:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 555. [2022-11-03 02:01:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3574007220216606) internal successors, (752), 554 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 752 transitions. [2022-11-03 02:01:01,133 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 752 transitions. Word has length 266 [2022-11-03 02:01:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:01,133 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 752 transitions. [2022-11-03 02:01:01,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 752 transitions. [2022-11-03 02:01:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:01,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:01,135 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:01,357 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1084884971, now seen corresponding path program 1 times [2022-11-03 02:01:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:01,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560043909] [2022-11-03 02:01:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:01,360 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:01,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:01:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:02,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:02,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560043909] [2022-11-03 02:01:02,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560043909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:02,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:02,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942850047] [2022-11-03 02:01:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:02,793 INFO L87 Difference]: Start difference. First operand 555 states and 752 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:04,967 INFO L93 Difference]: Finished difference Result 2386 states and 3410 transitions. [2022-11-03 02:01:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:04,970 INFO L225 Difference]: With dead ends: 2386 [2022-11-03 02:01:04,970 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:01:04,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:04,970 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 3771 mSDsluCounter, 5026 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5651 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:04,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5651 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:01:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 557. [2022-11-03 02:01:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.356115107913669) internal successors, (754), 556 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 754 transitions. [2022-11-03 02:01:04,980 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 754 transitions. Word has length 266 [2022-11-03 02:01:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:04,980 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 754 transitions. [2022-11-03 02:01:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 754 transitions. [2022-11-03 02:01:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:04,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:04,982 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:05,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-03 02:01:05,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:05,182 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1325124717, now seen corresponding path program 1 times [2022-11-03 02:01:05,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394108523] [2022-11-03 02:01:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:05,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:05,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:05,185 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:05,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:01:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:06,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:06,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394108523] [2022-11-03 02:01:06,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394108523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:06,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:06,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803486731] [2022-11-03 02:01:06,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:06,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:06,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:06,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:06,602 INFO L87 Difference]: Start difference. First operand 557 states and 754 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:08,785 INFO L93 Difference]: Finished difference Result 2396 states and 3421 transitions. [2022-11-03 02:01:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:08,788 INFO L225 Difference]: With dead ends: 2396 [2022-11-03 02:01:08,788 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 02:01:08,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:08,789 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 3774 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:08,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5656 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 02:01:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 559. [2022-11-03 02:01:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3548387096774193) internal successors, (756), 558 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 756 transitions. [2022-11-03 02:01:08,804 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 756 transitions. Word has length 266 [2022-11-03 02:01:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:08,804 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 756 transitions. [2022-11-03 02:01:08,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 756 transitions. [2022-11-03 02:01:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:08,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:08,806 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:08,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 02:01:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:09,020 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1352190319, now seen corresponding path program 1 times [2022-11-03 02:01:09,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:09,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679689337] [2022-11-03 02:01:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:09,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:09,023 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:09,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:01:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:09,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:10,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:10,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:10,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679689337] [2022-11-03 02:01:10,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679689337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:10,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:10,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163786362] [2022-11-03 02:01:10,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:10,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:10,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:10,510 INFO L87 Difference]: Start difference. First operand 559 states and 756 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:12,713 INFO L93 Difference]: Finished difference Result 2406 states and 3432 transitions. [2022-11-03 02:01:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:12,715 INFO L225 Difference]: With dead ends: 2406 [2022-11-03 02:01:12,716 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:01:12,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:12,716 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 3777 mSDsluCounter, 5028 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5661 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:12,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5661 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:01:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 561. [2022-11-03 02:01:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3535714285714286) internal successors, (758), 560 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 758 transitions. [2022-11-03 02:01:12,733 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 758 transitions. Word has length 266 [2022-11-03 02:01:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:12,733 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 758 transitions. [2022-11-03 02:01:12,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 758 transitions. [2022-11-03 02:01:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:12,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:12,735 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:12,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:12,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:12,959 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1208672527, now seen corresponding path program 1 times [2022-11-03 02:01:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053834571] [2022-11-03 02:01:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:12,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:12,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:12,962 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:12,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 02:01:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:14,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:14,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053834571] [2022-11-03 02:01:14,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053834571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:14,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:14,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123503901] [2022-11-03 02:01:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:14,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:14,384 INFO L87 Difference]: Start difference. First operand 561 states and 758 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:16,616 INFO L93 Difference]: Finished difference Result 2416 states and 3443 transitions. [2022-11-03 02:01:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:16,617 INFO L225 Difference]: With dead ends: 2416 [2022-11-03 02:01:16,617 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:01:16,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:16,618 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 3780 mSDsluCounter, 5029 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5666 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:16,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5666 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:01:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 563. [2022-11-03 02:01:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3523131672597866) internal successors, (760), 562 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 760 transitions. [2022-11-03 02:01:16,629 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 760 transitions. Word has length 266 [2022-11-03 02:01:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 760 transitions. [2022-11-03 02:01:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 760 transitions. [2022-11-03 02:01:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:16,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:16,631 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:16,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 02:01:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:16,836 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1175252211, now seen corresponding path program 1 times [2022-11-03 02:01:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865134276] [2022-11-03 02:01:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:16,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:16,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:16,840 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:01:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:18,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:18,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:18,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865134276] [2022-11-03 02:01:18,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865134276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:18,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:18,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254970716] [2022-11-03 02:01:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:18,339 INFO L87 Difference]: Start difference. First operand 563 states and 760 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:20,492 INFO L93 Difference]: Finished difference Result 2426 states and 3454 transitions. [2022-11-03 02:01:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:20,494 INFO L225 Difference]: With dead ends: 2426 [2022-11-03 02:01:20,494 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:01:20,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:20,495 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 3783 mSDsluCounter, 5030 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5671 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:20,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5671 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:01:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 565. [2022-11-03 02:01:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.351063829787234) internal successors, (762), 564 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 762 transitions. [2022-11-03 02:01:20,510 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 762 transitions. Word has length 266 [2022-11-03 02:01:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:20,510 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 762 transitions. [2022-11-03 02:01:20,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 762 transitions. [2022-11-03 02:01:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:20,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:20,512 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:20,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:01:20,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:20,733 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash 207901557, now seen corresponding path program 1 times [2022-11-03 02:01:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004281126] [2022-11-03 02:01:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:20,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:20,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:20,735 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:20,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 02:01:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:22,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:22,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004281126] [2022-11-03 02:01:22,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004281126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:22,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:22,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110585556] [2022-11-03 02:01:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:22,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:22,232 INFO L87 Difference]: Start difference. First operand 565 states and 762 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:24,418 INFO L93 Difference]: Finished difference Result 2436 states and 3465 transitions. [2022-11-03 02:01:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:24,420 INFO L225 Difference]: With dead ends: 2436 [2022-11-03 02:01:24,420 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 02:01:24,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:24,421 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 3786 mSDsluCounter, 5031 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3786 SdHoareTripleChecker+Valid, 5676 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:24,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3786 Valid, 5676 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 02:01:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 567. [2022-11-03 02:01:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3498233215547704) internal successors, (764), 566 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 764 transitions. [2022-11-03 02:01:24,432 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 764 transitions. Word has length 266 [2022-11-03 02:01:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:24,432 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 764 transitions. [2022-11-03 02:01:24,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 764 transitions. [2022-11-03 02:01:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:24,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:24,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:24,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:24,634 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -284724617, now seen corresponding path program 1 times [2022-11-03 02:01:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074290349] [2022-11-03 02:01:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:24,636 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:24,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:01:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:26,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:26,122 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:26,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074290349] [2022-11-03 02:01:26,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074290349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:26,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:26,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035825654] [2022-11-03 02:01:26,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:26,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:26,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:26,124 INFO L87 Difference]: Start difference. First operand 567 states and 764 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:28,294 INFO L93 Difference]: Finished difference Result 2358 states and 3358 transitions. [2022-11-03 02:01:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:28,296 INFO L225 Difference]: With dead ends: 2358 [2022-11-03 02:01:28,296 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 02:01:28,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:28,297 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 3734 mSDsluCounter, 4972 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5627 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:28,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5627 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 02:01:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 571. [2022-11-03 02:01:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.3491228070175438) internal successors, (769), 570 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 769 transitions. [2022-11-03 02:01:28,318 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 769 transitions. Word has length 266 [2022-11-03 02:01:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:28,318 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 769 transitions. [2022-11-03 02:01:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 769 transitions. [2022-11-03 02:01:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:28,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:28,320 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:28,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 02:01:28,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:28,541 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1970904455, now seen corresponding path program 1 times [2022-11-03 02:01:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165447349] [2022-11-03 02:01:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:28,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:28,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:28,547 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:28,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:01:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:30,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:30,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:30,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165447349] [2022-11-03 02:01:30,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165447349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060284594] [2022-11-03 02:01:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:30,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:30,012 INFO L87 Difference]: Start difference. First operand 571 states and 769 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:32,171 INFO L93 Difference]: Finished difference Result 2370 states and 3372 transitions. [2022-11-03 02:01:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:32,173 INFO L225 Difference]: With dead ends: 2370 [2022-11-03 02:01:32,173 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 02:01:32,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:32,174 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 3737 mSDsluCounter, 4973 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:32,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5632 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 02:01:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 573. [2022-11-03 02:01:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.347902097902098) internal successors, (771), 572 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 771 transitions. [2022-11-03 02:01:32,191 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 771 transitions. Word has length 266 [2022-11-03 02:01:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:32,192 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 771 transitions. [2022-11-03 02:01:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 771 transitions. [2022-11-03 02:01:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:32,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:32,194 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:32,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:32,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:32,417 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:32,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1906666235, now seen corresponding path program 1 times [2022-11-03 02:01:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:32,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792643866] [2022-11-03 02:01:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:32,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:32,419 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:32,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:01:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:33,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:33,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792643866] [2022-11-03 02:01:33,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792643866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:33,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:33,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511164111] [2022-11-03 02:01:33,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:33,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:33,907 INFO L87 Difference]: Start difference. First operand 573 states and 771 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:36,131 INFO L93 Difference]: Finished difference Result 2380 states and 3383 transitions. [2022-11-03 02:01:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:36,134 INFO L225 Difference]: With dead ends: 2380 [2022-11-03 02:01:36,134 INFO L226 Difference]: Without dead ends: 1939 [2022-11-03 02:01:36,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:36,136 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 3740 mSDsluCounter, 4974 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:36,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5637 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-11-03 02:01:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 575. [2022-11-03 02:01:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3466898954703832) internal successors, (773), 574 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 773 transitions. [2022-11-03 02:01:36,149 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 773 transitions. Word has length 266 [2022-11-03 02:01:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:36,150 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 773 transitions. [2022-11-03 02:01:36,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 773 transitions. [2022-11-03 02:01:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:36,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:36,151 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:36,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:36,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:36,351 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -426726403, now seen corresponding path program 1 times [2022-11-03 02:01:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864689561] [2022-11-03 02:01:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:36,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:36,354 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:36,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 02:01:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:37,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:37,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:37,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864689561] [2022-11-03 02:01:37,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864689561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:37,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:37,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121380837] [2022-11-03 02:01:37,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:37,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:37,977 INFO L87 Difference]: Start difference. First operand 575 states and 773 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:40,317 INFO L93 Difference]: Finished difference Result 2390 states and 3394 transitions. [2022-11-03 02:01:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:40,320 INFO L225 Difference]: With dead ends: 2390 [2022-11-03 02:01:40,320 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 02:01:40,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:40,321 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 3743 mSDsluCounter, 4975 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5642 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:40,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5642 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:01:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 02:01:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 577. [2022-11-03 02:01:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.3454861111111112) internal successors, (775), 576 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 775 transitions. [2022-11-03 02:01:40,333 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 775 transitions. Word has length 266 [2022-11-03 02:01:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:40,333 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 775 transitions. [2022-11-03 02:01:40,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 775 transitions. [2022-11-03 02:01:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:40,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:40,335 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:40,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 02:01:40,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:40,536 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash 133973375, now seen corresponding path program 1 times [2022-11-03 02:01:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:40,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387762881] [2022-11-03 02:01:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:40,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:40,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:40,539 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:40,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:01:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:42,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:42,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:42,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387762881] [2022-11-03 02:01:42,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387762881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:42,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:42,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251852114] [2022-11-03 02:01:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:42,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:42,094 INFO L87 Difference]: Start difference. First operand 577 states and 775 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:44,342 INFO L93 Difference]: Finished difference Result 2400 states and 3405 transitions. [2022-11-03 02:01:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:44,344 INFO L225 Difference]: With dead ends: 2400 [2022-11-03 02:01:44,344 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:01:44,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:01:44,345 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 3746 mSDsluCounter, 4976 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5647 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:44,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5647 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:01:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:01:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 579. [2022-11-03 02:01:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.3442906574394464) internal successors, (777), 578 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 777 transitions. [2022-11-03 02:01:44,359 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 777 transitions. Word has length 266 [2022-11-03 02:01:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:44,359 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 777 transitions. [2022-11-03 02:01:44,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 777 transitions. [2022-11-03 02:01:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:44,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:44,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:44,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:44,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:44,561 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1394890625, now seen corresponding path program 1 times [2022-11-03 02:01:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338704324] [2022-11-03 02:01:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:44,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:44,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:44,564 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:44,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 02:01:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:46,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:46,065 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338704324] [2022-11-03 02:01:46,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338704324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:46,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308887119] [2022-11-03 02:01:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:46,067 INFO L87 Difference]: Start difference. First operand 579 states and 777 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:48,249 INFO L93 Difference]: Finished difference Result 2410 states and 3416 transitions. [2022-11-03 02:01:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:48,251 INFO L225 Difference]: With dead ends: 2410 [2022-11-03 02:01:48,251 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:01:48,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:48,252 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 3749 mSDsluCounter, 4977 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5652 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:48,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5652 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:01:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 581. [2022-11-03 02:01:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3431034482758621) internal successors, (779), 580 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 779 transitions. [2022-11-03 02:01:48,264 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 779 transitions. Word has length 266 [2022-11-03 02:01:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:48,265 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 779 transitions. [2022-11-03 02:01:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 779 transitions. [2022-11-03 02:01:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:48,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:48,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:48,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:48,469 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1513291261, now seen corresponding path program 1 times [2022-11-03 02:01:48,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865044090] [2022-11-03 02:01:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:48,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:48,471 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:48,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 02:01:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:50,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:50,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865044090] [2022-11-03 02:01:50,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865044090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:50,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549455068] [2022-11-03 02:01:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:50,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:50,032 INFO L87 Difference]: Start difference. First operand 581 states and 779 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:52,205 INFO L93 Difference]: Finished difference Result 2428 states and 3439 transitions. [2022-11-03 02:01:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:52,207 INFO L225 Difference]: With dead ends: 2428 [2022-11-03 02:01:52,207 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:01:52,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:52,208 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 3759 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:52,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5667 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:01:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 585. [2022-11-03 02:01:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.3424657534246576) internal successors, (784), 584 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 784 transitions. [2022-11-03 02:01:52,222 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 784 transitions. Word has length 266 [2022-11-03 02:01:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:52,223 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 784 transitions. [2022-11-03 02:01:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 784 transitions. [2022-11-03 02:01:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:52,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:52,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:52,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:52,425 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 753089925, now seen corresponding path program 1 times [2022-11-03 02:01:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:52,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268023028] [2022-11-03 02:01:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:52,428 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:52,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:01:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:53,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:53,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:53,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268023028] [2022-11-03 02:01:53,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268023028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:53,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:53,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033740538] [2022-11-03 02:01:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:53,945 INFO L87 Difference]: Start difference. First operand 585 states and 784 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:56,059 INFO L93 Difference]: Finished difference Result 2440 states and 3453 transitions. [2022-11-03 02:01:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:56,061 INFO L225 Difference]: With dead ends: 2440 [2022-11-03 02:01:56,061 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:01:56,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:56,062 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 3762 mSDsluCounter, 4983 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5672 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:56,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5672 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:01:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:01:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 587. [2022-11-03 02:01:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.341296928327645) internal successors, (786), 586 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 786 transitions. [2022-11-03 02:01:56,074 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 786 transitions. Word has length 266 [2022-11-03 02:01:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:56,074 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 786 transitions. [2022-11-03 02:01:56,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,075 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 786 transitions. [2022-11-03 02:01:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:56,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:56,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:56,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 02:01:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:01:56,276 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash 737571207, now seen corresponding path program 1 times [2022-11-03 02:01:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768261194] [2022-11-03 02:01:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:56,279 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:56,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 02:01:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:01:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:57,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:01:57,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768261194] [2022-11-03 02:01:57,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768261194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:57,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:57,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:01:57,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668594287] [2022-11-03 02:01:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:01:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:01:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:01:57,813 INFO L87 Difference]: Start difference. First operand 587 states and 786 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:59,947 INFO L93 Difference]: Finished difference Result 2450 states and 3464 transitions. [2022-11-03 02:01:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:01:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:01:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:59,949 INFO L225 Difference]: With dead ends: 2450 [2022-11-03 02:01:59,949 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:01:59,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:01:59,950 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 3765 mSDsluCounter, 4984 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5677 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:59,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5677 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:01:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:01:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 589. [2022-11-03 02:01:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.3401360544217686) internal successors, (788), 588 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 788 transitions. [2022-11-03 02:01:59,960 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 788 transitions. Word has length 266 [2022-11-03 02:01:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:59,960 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 788 transitions. [2022-11-03 02:01:59,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 788 transitions. [2022-11-03 02:01:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:01:59,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:59,961 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:59,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 02:02:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:00,164 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash 384482825, now seen corresponding path program 1 times [2022-11-03 02:02:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:00,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025222363] [2022-11-03 02:02:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:00,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:00,167 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:00,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:02:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:01,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:01,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:01,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025222363] [2022-11-03 02:02:01,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025222363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:01,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:01,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193307489] [2022-11-03 02:02:01,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:01,772 INFO L87 Difference]: Start difference. First operand 589 states and 788 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:03,945 INFO L93 Difference]: Finished difference Result 2460 states and 3475 transitions. [2022-11-03 02:02:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:03,947 INFO L225 Difference]: With dead ends: 2460 [2022-11-03 02:02:03,947 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 02:02:03,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:02:03,948 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 3768 mSDsluCounter, 4985 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5682 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5682 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:02:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 02:02:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 591. [2022-11-03 02:02:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3389830508474576) internal successors, (790), 590 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 790 transitions. [2022-11-03 02:02:03,963 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 790 transitions. Word has length 266 [2022-11-03 02:02:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:03,964 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 790 transitions. [2022-11-03 02:02:03,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 790 transitions. [2022-11-03 02:02:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:03,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:03,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:03,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-03 02:02:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:04,165 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1277969163, now seen corresponding path program 1 times [2022-11-03 02:02:04,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084344340] [2022-11-03 02:02:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:04,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:04,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:04,168 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:02:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:05,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:05,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084344340] [2022-11-03 02:02:05,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084344340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:05,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:05,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:05,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398981976] [2022-11-03 02:02:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:05,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:05,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:05,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:05,710 INFO L87 Difference]: Start difference. First operand 591 states and 790 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:07,988 INFO L93 Difference]: Finished difference Result 2470 states and 3486 transitions. [2022-11-03 02:02:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:07,990 INFO L225 Difference]: With dead ends: 2470 [2022-11-03 02:02:07,990 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 02:02:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:02:07,991 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 3771 mSDsluCounter, 4986 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5687 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5687 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 02:02:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 593. [2022-11-03 02:02:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.337837837837838) internal successors, (792), 592 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 792 transitions. [2022-11-03 02:02:08,005 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 792 transitions. Word has length 266 [2022-11-03 02:02:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:08,005 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 792 transitions. [2022-11-03 02:02:08,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 792 transitions. [2022-11-03 02:02:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:08,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:08,006 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:08,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 02:02:08,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:08,207 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 380575885, now seen corresponding path program 1 times [2022-11-03 02:02:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:08,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880113895] [2022-11-03 02:02:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:08,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:08,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:08,210 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:08,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:02:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:09,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:09,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:09,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880113895] [2022-11-03 02:02:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880113895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:09,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:09,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836856234] [2022-11-03 02:02:09,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:09,795 INFO L87 Difference]: Start difference. First operand 593 states and 792 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:12,066 INFO L93 Difference]: Finished difference Result 2480 states and 3497 transitions. [2022-11-03 02:02:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:12,068 INFO L225 Difference]: With dead ends: 2480 [2022-11-03 02:02:12,068 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 02:02:12,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:12,069 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 3774 mSDsluCounter, 4987 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5692 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:12,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5692 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 02:02:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 595. [2022-11-03 02:02:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3367003367003367) internal successors, (794), 594 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 794 transitions. [2022-11-03 02:02:12,081 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 794 transitions. Word has length 266 [2022-11-03 02:02:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:12,081 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 794 transitions. [2022-11-03 02:02:12,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 794 transitions. [2022-11-03 02:02:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:12,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:12,083 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:12,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 02:02:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:12,284 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash 804222607, now seen corresponding path program 1 times [2022-11-03 02:02:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357047998] [2022-11-03 02:02:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:12,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:12,287 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:12,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 02:02:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:14,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:14,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357047998] [2022-11-03 02:02:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357047998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:14,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:14,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984253629] [2022-11-03 02:02:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:14,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:14,346 INFO L87 Difference]: Start difference. First operand 595 states and 794 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:16,857 INFO L93 Difference]: Finished difference Result 2490 states and 3508 transitions. [2022-11-03 02:02:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:16,859 INFO L225 Difference]: With dead ends: 2490 [2022-11-03 02:02:16,859 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 02:02:16,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:16,860 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 3777 mSDsluCounter, 4988 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5697 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:16,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5697 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:02:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 02:02:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 597. [2022-11-03 02:02:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.3355704697986577) internal successors, (796), 596 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2022-11-03 02:02:16,871 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 266 [2022-11-03 02:02:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:16,871 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2022-11-03 02:02:16,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2022-11-03 02:02:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:16,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:16,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:16,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 02:02:17,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:17,073 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:17,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1041144559, now seen corresponding path program 1 times [2022-11-03 02:02:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:17,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878221738] [2022-11-03 02:02:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:17,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:17,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:17,076 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:17,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:02:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:18,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:18,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878221738] [2022-11-03 02:02:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878221738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:18,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:18,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655216482] [2022-11-03 02:02:18,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:18,703 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:21,241 INFO L93 Difference]: Finished difference Result 2500 states and 3519 transitions. [2022-11-03 02:02:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:21,244 INFO L225 Difference]: With dead ends: 2500 [2022-11-03 02:02:21,244 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 02:02:21,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:21,245 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 3780 mSDsluCounter, 4989 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5702 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:21,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5702 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:02:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 02:02:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 599. [2022-11-03 02:02:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.334448160535117) internal successors, (798), 598 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 798 transitions. [2022-11-03 02:02:21,256 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 798 transitions. Word has length 266 [2022-11-03 02:02:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:21,257 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 798 transitions. [2022-11-03 02:02:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 798 transitions. [2022-11-03 02:02:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:21,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:21,258 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:21,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:21,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:21,458 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -381613037, now seen corresponding path program 1 times [2022-11-03 02:02:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015075090] [2022-11-03 02:02:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:21,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:21,461 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:21,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:02:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:23,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:23,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:23,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015075090] [2022-11-03 02:02:23,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015075090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:23,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:23,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:23,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782015623] [2022-11-03 02:02:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:23,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:23,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:23,101 INFO L87 Difference]: Start difference. First operand 599 states and 798 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:25,552 INFO L93 Difference]: Finished difference Result 2422 states and 3412 transitions. [2022-11-03 02:02:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:25,554 INFO L225 Difference]: With dead ends: 2422 [2022-11-03 02:02:25,554 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:02:25,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:25,555 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 3728 mSDsluCounter, 4930 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 5653 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:25,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3728 Valid, 5653 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:02:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:02:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 603. [2022-11-03 02:02:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.3338870431893688) internal successors, (803), 602 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 803 transitions. [2022-11-03 02:02:25,567 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 803 transitions. Word has length 266 [2022-11-03 02:02:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:25,568 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 803 transitions. [2022-11-03 02:02:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 803 transitions. [2022-11-03 02:02:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:25,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:25,570 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:25,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 02:02:25,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:25,770 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -453999595, now seen corresponding path program 1 times [2022-11-03 02:02:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099050681] [2022-11-03 02:02:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:25,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:25,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:25,774 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:25,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:02:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:27,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:27,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:27,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099050681] [2022-11-03 02:02:27,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099050681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:27,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816580291] [2022-11-03 02:02:27,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:27,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:27,596 INFO L87 Difference]: Start difference. First operand 603 states and 803 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:30,067 INFO L93 Difference]: Finished difference Result 2434 states and 3426 transitions. [2022-11-03 02:02:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:30,069 INFO L225 Difference]: With dead ends: 2434 [2022-11-03 02:02:30,069 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:02:30,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:30,070 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 3731 mSDsluCounter, 4931 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3731 SdHoareTripleChecker+Valid, 5658 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:30,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3731 Valid, 5658 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:02:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:02:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 605. [2022-11-03 02:02:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.3327814569536425) internal successors, (805), 604 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 805 transitions. [2022-11-03 02:02:30,082 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 805 transitions. Word has length 266 [2022-11-03 02:02:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:30,083 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 805 transitions. [2022-11-03 02:02:30,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 805 transitions. [2022-11-03 02:02:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:30,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:30,085 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:30,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:30,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:30,289 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 247600279, now seen corresponding path program 1 times [2022-11-03 02:02:30,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582549030] [2022-11-03 02:02:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:30,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:30,292 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:02:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:32,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:32,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582549030] [2022-11-03 02:02:32,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582549030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:32,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:32,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049657364] [2022-11-03 02:02:32,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:32,014 INFO L87 Difference]: Start difference. First operand 605 states and 805 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:34,298 INFO L93 Difference]: Finished difference Result 2444 states and 3437 transitions. [2022-11-03 02:02:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:34,300 INFO L225 Difference]: With dead ends: 2444 [2022-11-03 02:02:34,300 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 02:02:34,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:34,301 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 3734 mSDsluCounter, 4932 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:34,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5663 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 02:02:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 607. [2022-11-03 02:02:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.3316831683168318) internal successors, (807), 606 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 807 transitions. [2022-11-03 02:02:34,312 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 807 transitions. Word has length 266 [2022-11-03 02:02:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:34,312 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 807 transitions. [2022-11-03 02:02:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 807 transitions. [2022-11-03 02:02:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:34,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:34,314 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:34,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:02:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,515 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1633803673, now seen corresponding path program 1 times [2022-11-03 02:02:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258258591] [2022-11-03 02:02:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:34,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:34,518 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:34,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:02:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:35,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:36,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258258591] [2022-11-03 02:02:36,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258258591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:36,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:36,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88388798] [2022-11-03 02:02:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:36,219 INFO L87 Difference]: Start difference. First operand 607 states and 807 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:38,629 INFO L93 Difference]: Finished difference Result 2454 states and 3448 transitions. [2022-11-03 02:02:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:38,632 INFO L225 Difference]: With dead ends: 2454 [2022-11-03 02:02:38,632 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:02:38,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:38,633 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 3737 mSDsluCounter, 4933 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5668 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:38,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5668 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:02:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:02:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 609. [2022-11-03 02:02:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.330592105263158) internal successors, (809), 608 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 809 transitions. [2022-11-03 02:02:38,648 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 809 transitions. Word has length 266 [2022-11-03 02:02:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:38,648 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 809 transitions. [2022-11-03 02:02:38,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 809 transitions. [2022-11-03 02:02:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:38,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:38,649 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:38,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 02:02:38,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:38,850 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash -737935589, now seen corresponding path program 1 times [2022-11-03 02:02:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598586562] [2022-11-03 02:02:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:38,853 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:38,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 02:02:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:40,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:40,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598586562] [2022-11-03 02:02:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598586562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:40,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:40,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:40,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423851414] [2022-11-03 02:02:40,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:40,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:40,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:40,549 INFO L87 Difference]: Start difference. First operand 609 states and 809 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:42,847 INFO L93 Difference]: Finished difference Result 2464 states and 3459 transitions. [2022-11-03 02:02:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:42,850 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 02:02:42,850 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:02:42,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:42,851 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 3740 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5673 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:42,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5673 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:02:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 611. [2022-11-03 02:02:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.3295081967213114) internal successors, (811), 610 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 811 transitions. [2022-11-03 02:02:42,866 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 811 transitions. Word has length 266 [2022-11-03 02:02:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:42,867 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 811 transitions. [2022-11-03 02:02:42,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 811 transitions. [2022-11-03 02:02:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:42,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:42,868 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:42,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 02:02:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:43,069 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash -597386979, now seen corresponding path program 1 times [2022-11-03 02:02:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:43,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493243284] [2022-11-03 02:02:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:43,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:43,071 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:43,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:02:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:44,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:44,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493243284] [2022-11-03 02:02:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493243284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:44,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113088251] [2022-11-03 02:02:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:44,722 INFO L87 Difference]: Start difference. First operand 611 states and 811 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:46,976 INFO L93 Difference]: Finished difference Result 2474 states and 3470 transitions. [2022-11-03 02:02:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:46,978 INFO L225 Difference]: With dead ends: 2474 [2022-11-03 02:02:46,978 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:02:46,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:46,979 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 3743 mSDsluCounter, 4935 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5678 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:46,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5678 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:02:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 613. [2022-11-03 02:02:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.3284313725490196) internal successors, (813), 612 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 813 transitions. [2022-11-03 02:02:46,991 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 813 transitions. Word has length 266 [2022-11-03 02:02:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:46,991 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 813 transitions. [2022-11-03 02:02:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 813 transitions. [2022-11-03 02:02:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:46,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:46,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:47,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:47,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:47,196 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1892141983, now seen corresponding path program 1 times [2022-11-03 02:02:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:47,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6464144] [2022-11-03 02:02:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:47,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:47,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:47,199 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:47,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 02:02:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:47,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:48,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:48,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6464144] [2022-11-03 02:02:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6464144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536921452] [2022-11-03 02:02:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:48,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:48,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:48,886 INFO L87 Difference]: Start difference. First operand 613 states and 813 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:51,190 INFO L93 Difference]: Finished difference Result 2492 states and 3493 transitions. [2022-11-03 02:02:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:51,192 INFO L225 Difference]: With dead ends: 2492 [2022-11-03 02:02:51,193 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 02:02:51,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:02:51,193 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 3753 mSDsluCounter, 4940 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3753 SdHoareTripleChecker+Valid, 5693 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:51,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3753 Valid, 5693 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 02:02:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 617. [2022-11-03 02:02:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.327922077922078) internal successors, (818), 616 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 818 transitions. [2022-11-03 02:02:51,206 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 818 transitions. Word has length 266 [2022-11-03 02:02:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:51,206 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 818 transitions. [2022-11-03 02:02:51,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 818 transitions. [2022-11-03 02:02:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:51,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:51,207 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:51,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 02:02:51,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:51,408 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 203198241, now seen corresponding path program 1 times [2022-11-03 02:02:51,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29316759] [2022-11-03 02:02:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:51,411 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:51,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 02:02:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:53,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:53,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:53,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29316759] [2022-11-03 02:02:53,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29316759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:53,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:53,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053502897] [2022-11-03 02:02:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:53,116 INFO L87 Difference]: Start difference. First operand 617 states and 818 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:55,374 INFO L93 Difference]: Finished difference Result 2504 states and 3507 transitions. [2022-11-03 02:02:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:55,377 INFO L225 Difference]: With dead ends: 2504 [2022-11-03 02:02:55,377 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 02:02:55,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:02:55,378 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 3756 mSDsluCounter, 4941 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 5698 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:55,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 5698 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:02:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 02:02:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 619. [2022-11-03 02:02:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.3268608414239482) internal successors, (820), 618 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 820 transitions. [2022-11-03 02:02:55,394 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 820 transitions. Word has length 266 [2022-11-03 02:02:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:55,394 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 820 transitions. [2022-11-03 02:02:55,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 820 transitions. [2022-11-03 02:02:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:55,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:55,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:55,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:55,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:55,600 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1385149661, now seen corresponding path program 1 times [2022-11-03 02:02:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:55,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782186609] [2022-11-03 02:02:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:55,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:55,604 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:55,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 02:02:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:56,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:02:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:57,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:57,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:57,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782186609] [2022-11-03 02:02:57,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782186609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:57,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:57,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:02:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630508049] [2022-11-03 02:02:57,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:02:57,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:02:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:57,245 INFO L87 Difference]: Start difference. First operand 619 states and 820 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:59,411 INFO L93 Difference]: Finished difference Result 2514 states and 3518 transitions. [2022-11-03 02:02:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:02:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:02:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:59,412 INFO L225 Difference]: With dead ends: 2514 [2022-11-03 02:02:59,413 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 02:02:59,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:02:59,413 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 3759 mSDsluCounter, 4942 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:59,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5703 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:02:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 02:02:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 621. [2022-11-03 02:02:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.3258064516129033) internal successors, (822), 620 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 822 transitions. [2022-11-03 02:02:59,424 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 822 transitions. Word has length 266 [2022-11-03 02:02:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:59,425 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 822 transitions. [2022-11-03 02:02:59,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 822 transitions. [2022-11-03 02:02:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:02:59,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:59,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:59,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-03 02:02:59,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:59,632 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1629953957, now seen corresponding path program 1 times [2022-11-03 02:02:59,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:59,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631613401] [2022-11-03 02:02:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:59,635 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:59,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:03:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:03:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:01,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:01,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631613401] [2022-11-03 02:03:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631613401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:01,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:03:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935911380] [2022-11-03 02:03:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:01,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:03:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:03:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:03:01,239 INFO L87 Difference]: Start difference. First operand 621 states and 822 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:03,451 INFO L93 Difference]: Finished difference Result 2524 states and 3529 transitions. [2022-11-03 02:03:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:03:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:03:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:03,454 INFO L225 Difference]: With dead ends: 2524 [2022-11-03 02:03:03,454 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 02:03:03,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:03:03,455 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 3762 mSDsluCounter, 4943 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5708 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:03,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5708 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:03:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 02:03:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 623. [2022-11-03 02:03:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.32475884244373) internal successors, (824), 622 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 824 transitions. [2022-11-03 02:03:03,475 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 824 transitions. Word has length 266 [2022-11-03 02:03:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:03,476 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 824 transitions. [2022-11-03 02:03:03,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 824 transitions. [2022-11-03 02:03:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:03:03,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:03,477 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:03,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 02:03:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:03,681 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1043147943, now seen corresponding path program 1 times [2022-11-03 02:03:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32198493] [2022-11-03 02:03:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:03,684 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:03,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 02:03:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:03:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:05,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:05,299 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32198493] [2022-11-03 02:03:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32198493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:05,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:05,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:03:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910771270] [2022-11-03 02:03:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:03:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:03:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:03:05,301 INFO L87 Difference]: Start difference. First operand 623 states and 824 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:07,487 INFO L93 Difference]: Finished difference Result 2534 states and 3540 transitions. [2022-11-03 02:03:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:03:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:03:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:07,489 INFO L225 Difference]: With dead ends: 2534 [2022-11-03 02:03:07,489 INFO L226 Difference]: Without dead ends: 2043 [2022-11-03 02:03:07,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:03:07,490 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 3765 mSDsluCounter, 4944 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5713 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:07,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5713 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:03:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-03 02:03:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 625. [2022-11-03 02:03:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.3237179487179487) internal successors, (826), 624 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 826 transitions. [2022-11-03 02:03:07,501 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 826 transitions. Word has length 266 [2022-11-03 02:03:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:07,501 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 826 transitions. [2022-11-03 02:03:07,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 826 transitions. [2022-11-03 02:03:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:03:07,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:07,502 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:07,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 02:03:07,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:07,703 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1744212521, now seen corresponding path program 1 times [2022-11-03 02:03:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204455544] [2022-11-03 02:03:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:07,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:07,705 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:07,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 02:03:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:03:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:09,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:09,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204455544] [2022-11-03 02:03:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204455544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:09,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:03:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827752091] [2022-11-03 02:03:09,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:09,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:03:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:03:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:03:09,370 INFO L87 Difference]: Start difference. First operand 625 states and 826 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:11,713 INFO L93 Difference]: Finished difference Result 2544 states and 3551 transitions. [2022-11-03 02:03:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:03:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:03:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:11,716 INFO L225 Difference]: With dead ends: 2544 [2022-11-03 02:03:11,716 INFO L226 Difference]: Without dead ends: 2051 [2022-11-03 02:03:11,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:03:11,717 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 3768 mSDsluCounter, 4945 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5718 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:11,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5718 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:03:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-03 02:03:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 627. [2022-11-03 02:03:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.3226837060702876) internal successors, (828), 626 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 828 transitions. [2022-11-03 02:03:11,730 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 828 transitions. Word has length 266 [2022-11-03 02:03:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:11,731 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 828 transitions. [2022-11-03 02:03:11,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 828 transitions. [2022-11-03 02:03:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:03:11,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:11,732 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:11,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 02:03:11,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:11,949 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1870696405, now seen corresponding path program 1 times [2022-11-03 02:03:11,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:11,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315232488] [2022-11-03 02:03:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:11,951 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:03:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:03:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:13,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:13,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315232488] [2022-11-03 02:03:13,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315232488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:13,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:13,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:03:13,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88155063] [2022-11-03 02:03:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:13,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:03:13,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:03:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:03:13,719 INFO L87 Difference]: Start difference. First operand 627 states and 828 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:16,203 INFO L93 Difference]: Finished difference Result 2554 states and 3562 transitions. [2022-11-03 02:03:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:03:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:03:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:16,206 INFO L225 Difference]: With dead ends: 2554 [2022-11-03 02:03:16,206 INFO L226 Difference]: Without dead ends: 2059 [2022-11-03 02:03:16,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:03:16,207 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 3771 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5723 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:16,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5723 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:03:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-03 02:03:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 629. [2022-11-03 02:03:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.321656050955414) internal successors, (830), 628 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 830 transitions. [2022-11-03 02:03:16,223 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 830 transitions. Word has length 266 [2022-11-03 02:03:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:16,223 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 830 transitions. [2022-11-03 02:03:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 830 transitions. [2022-11-03 02:03:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:03:16,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:16,225 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:16,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 02:03:16,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:16,425 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:16,426 INFO L85 PathProgramCache]: Analyzing trace with hash -95689043, now seen corresponding path program 1 times [2022-11-03 02:03:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:16,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019133265] [2022-11-03 02:03:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:16,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:16,428 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:16,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 02:03:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:03:17,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:18,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:18,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019133265] [2022-11-03 02:03:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019133265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:18,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:18,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:03:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611065728] [2022-11-03 02:03:18,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:03:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:03:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:03:18,155 INFO L87 Difference]: Start difference. First operand 629 states and 830 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:20,414 INFO L93 Difference]: Finished difference Result 2564 states and 3573 transitions. [2022-11-03 02:03:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:03:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:03:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:20,417 INFO L225 Difference]: With dead ends: 2564 [2022-11-03 02:03:20,417 INFO L226 Difference]: Without dead ends: 2067 [2022-11-03 02:03:20,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 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 02:03:20,417 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 3774 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5728 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:20,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5728 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:03:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-03 02:03:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 631. [2022-11-03 02:03:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.3206349206349206) internal successors, (832), 630 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 832 transitions. [2022-11-03 02:03:20,430 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 832 transitions. Word has length 266 [2022-11-03 02:03:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:20,430 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 832 transitions. [2022-11-03 02:03:20,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 832 transitions. [2022-11-03 02:03:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:03:20,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:20,431 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:20,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 02:03:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:20,632 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -93842001, now seen corresponding path program 1 times [2022-11-03 02:03:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638962375] [2022-11-03 02:03:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:20,635 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 02:03:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:03:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:03:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:26,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638962375] [2022-11-03 02:03:26,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638962375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1834657312] [2022-11-03 02:03:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:26,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:26,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:26,692 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:26,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 02:03:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:03:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1834657312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125238733] [2022-11-03 02:03:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:31,535 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:31,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 02:03:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:03:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:33,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:35,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125238733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:35,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:35,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 9, 9] total 25 [2022-11-03 02:03:35,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242961969] [2022-11-03 02:03:35,078 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:03:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:03:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:03:35,082 INFO L87 Difference]: Start difference. First operand 631 states and 832 transitions. Second operand has 25 states, 25 states have (on average 42.4) internal successors, (1060), 25 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:36,740 INFO L93 Difference]: Finished difference Result 1890 states and 2486 transitions. [2022-11-03 02:03:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:03:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 42.4) internal successors, (1060), 25 states have internal predecessors, (1060), 0 states have call successors, (0), 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 266 [2022-11-03 02:03:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:36,743 INFO L225 Difference]: With dead ends: 1890 [2022-11-03 02:03:36,744 INFO L226 Difference]: Without dead ends: 1888 [2022-11-03 02:03:36,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1606 GetRequests, 1568 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:03:36,745 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 1758 mSDsluCounter, 9886 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 10839 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1602 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:36,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1758 Valid, 10839 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 524 Invalid, 0 Unknown, 1602 Unchecked, 0.9s Time] [2022-11-03 02:03:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-11-03 02:03:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1128. [2022-11-03 02:03:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.3442768411712511) internal successors, (1515), 1127 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1515 transitions. [2022-11-03 02:03:36,780 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1515 transitions. Word has length 266 [2022-11-03 02:03:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:36,781 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1515 transitions. [2022-11-03 02:03:36,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 42.4) internal successors, (1060), 25 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1515 transitions. [2022-11-03 02:03:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:03:36,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:36,786 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:36,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:37,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:37,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-03 02:03:37,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:37,403 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash -95889671, now seen corresponding path program 1 times [2022-11-03 02:03:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934159305] [2022-11-03 02:03:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:37,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:37,407 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:37,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 02:03:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:38,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:40,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:40,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934159305] [2022-11-03 02:03:40,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934159305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1936681043] [2022-11-03 02:03:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:40,996 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:40,997 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:40,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 02:03:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:43,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:03:43,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:43,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1936681043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:43,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:03:43,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:03:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035361766] [2022-11-03 02:03:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:43,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:43,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:03:43,232 INFO L87 Difference]: Start difference. First operand 1128 states and 1515 transitions. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:43,436 INFO L93 Difference]: Finished difference Result 4228 states and 5753 transitions. [2022-11-03 02:03:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:03:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 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 527 [2022-11-03 02:03:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:43,440 INFO L225 Difference]: With dead ends: 4228 [2022-11-03 02:03:43,440 INFO L226 Difference]: Without dead ends: 3232 [2022-11-03 02:03:43,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:03:43,441 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 1352 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 2232 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 02:03:43,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 2232 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-11-03 02:03:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1180. [2022-11-03 02:03:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.349448685326548) internal successors, (1591), 1179 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1591 transitions. [2022-11-03 02:03:43,469 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1591 transitions. Word has length 527 [2022-11-03 02:03:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:43,469 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1591 transitions. [2022-11-03 02:03:43,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1591 transitions. [2022-11-03 02:03:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:03:43,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:43,472 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:43,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-03 02:03:43,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 02:03:43,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:43,873 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash -341697545, now seen corresponding path program 1 times [2022-11-03 02:03:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:43,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092381306] [2022-11-03 02:03:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:43,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:43,877 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:43,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 02:03:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:47,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092381306] [2022-11-03 02:03:47,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092381306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605900411] [2022-11-03 02:03:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:47,036 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:47,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:47,041 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:47,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-03 02:03:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:03:49,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:49,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605900411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:49,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:03:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:03:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868023554] [2022-11-03 02:03:49,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:49,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:03:49,224 INFO L87 Difference]: Start difference. First operand 1180 states and 1591 transitions. Second operand has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 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 02:03:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:49,399 INFO L93 Difference]: Finished difference Result 4522 states and 6188 transitions. [2022-11-03 02:03:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:03:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 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) Word has length 527 [2022-11-03 02:03:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:49,403 INFO L225 Difference]: With dead ends: 4522 [2022-11-03 02:03:49,403 INFO L226 Difference]: Without dead ends: 3474 [2022-11-03 02:03:49,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:03:49,405 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 1377 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:49,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 2292 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3474 states. [2022-11-03 02:03:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3474 to 1324. [2022-11-03 02:03:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.36281179138322) internal successors, (1803), 1323 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1803 transitions. [2022-11-03 02:03:49,431 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1803 transitions. Word has length 527 [2022-11-03 02:03:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:49,432 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 1803 transitions. [2022-11-03 02:03:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 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 02:03:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1803 transitions. [2022-11-03 02:03:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:03:49,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:49,435 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:49,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2022-11-03 02:03:49,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:49,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:49,835 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1939424373, now seen corresponding path program 1 times [2022-11-03 02:03:49,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:49,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406661776] [2022-11-03 02:03:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:49,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:49,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:49,839 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:49,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 02:03:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:52,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:52,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406661776] [2022-11-03 02:03:52,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406661776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18857582] [2022-11-03 02:03:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:52,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:52,956 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:52,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-03 02:03:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:03:55,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:55,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18857582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:55,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:03:55,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:03:55,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202353411] [2022-11-03 02:03:55,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:55,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:55,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:03:55,161 INFO L87 Difference]: Start difference. First operand 1324 states and 1803 transitions. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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 02:03:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:55,397 INFO L93 Difference]: Finished difference Result 5234 states and 7247 transitions. [2022-11-03 02:03:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:03:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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) Word has length 527 [2022-11-03 02:03:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:55,401 INFO L225 Difference]: With dead ends: 5234 [2022-11-03 02:03:55,401 INFO L226 Difference]: Without dead ends: 4042 [2022-11-03 02:03:55,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:03:55,402 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 1314 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 2253 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2022-11-03 02:03:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 1696. [2022-11-03 02:03:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.3858407079646018) internal successors, (2349), 1695 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2349 transitions. [2022-11-03 02:03:55,430 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2349 transitions. Word has length 527 [2022-11-03 02:03:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:55,431 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2349 transitions. [2022-11-03 02:03:55,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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 02:03:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2349 transitions. [2022-11-03 02:03:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:03:55,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:55,434 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:03:55,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:55,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2022-11-03 02:03:55,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:55,835 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1440867571, now seen corresponding path program 1 times [2022-11-03 02:03:55,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:55,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344860393] [2022-11-03 02:03:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:55,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:55,839 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:55,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 02:03:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:58,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344860393] [2022-11-03 02:03:58,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344860393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [10093060] [2022-11-03 02:03:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:58,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:58,965 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:58,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 02:04:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:04:01,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:01,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [10093060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:01,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:01,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:04:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443191271] [2022-11-03 02:04:01,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:01,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:01,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:04:01,288 INFO L87 Difference]: Start difference. First operand 1696 states and 2349 transitions. Second operand has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:01,518 INFO L93 Difference]: Finished difference Result 6642 states and 9306 transitions. [2022-11-03 02:04:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:04:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 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 527 [2022-11-03 02:04:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:01,524 INFO L225 Difference]: With dead ends: 6642 [2022-11-03 02:04:01,525 INFO L226 Difference]: Without dead ends: 5078 [2022-11-03 02:04:01,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:04:01,528 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 1329 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:01,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 2587 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2022-11-03 02:04:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 1960. [2022-11-03 02:04:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 1.3910158244002042) internal successors, (2725), 1959 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2725 transitions. [2022-11-03 02:04:01,596 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2725 transitions. Word has length 527 [2022-11-03 02:04:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:01,597 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2725 transitions. [2022-11-03 02:04:01,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2725 transitions. [2022-11-03 02:04:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:04:01,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:01,602 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:01,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:01,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-03 02:04:02,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:02,003 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1055005169, now seen corresponding path program 1 times [2022-11-03 02:04:02,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:02,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151334066] [2022-11-03 02:04:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:02,007 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:02,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 02:04:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:03,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:04:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:04,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:05,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151334066] [2022-11-03 02:04:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151334066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279412224] [2022-11-03 02:04:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:05,161 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:05,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-03 02:04:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:04:07,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:07,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279412224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:07,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:07,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:04:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26262482] [2022-11-03 02:04:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:07,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:04:07,356 INFO L87 Difference]: Start difference. First operand 1960 states and 2725 transitions. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:07,492 INFO L93 Difference]: Finished difference Result 7912 states and 11111 transitions. [2022-11-03 02:04:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 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 527 [2022-11-03 02:04:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:07,497 INFO L225 Difference]: With dead ends: 7912 [2022-11-03 02:04:07,497 INFO L226 Difference]: Without dead ends: 6084 [2022-11-03 02:04:07,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:04:07,499 INFO L413 NwaCegarLoop]: 1111 mSDtfsCounter, 1322 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2588 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 02:04:07,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2588 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6084 states. [2022-11-03 02:04:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 2472. [2022-11-03 02:04:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 1.39740995548361) internal successors, (3453), 2471 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3453 transitions. [2022-11-03 02:04:07,540 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3453 transitions. Word has length 527 [2022-11-03 02:04:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:07,540 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 3453 transitions. [2022-11-03 02:04:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3453 transitions. [2022-11-03 02:04:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:04:07,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:07,544 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:07,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2022-11-03 02:04:07,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:07,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:07,945 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1308836493, now seen corresponding path program 1 times [2022-11-03 02:04:07,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364842241] [2022-11-03 02:04:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:07,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:07,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:07,949 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-03 02:04:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:04:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:10,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:11,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364842241] [2022-11-03 02:04:11,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364842241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236810622] [2022-11-03 02:04:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:11,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:11,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:11,173 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:11,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-03 02:04:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:04:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 197 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:15,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236810622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427606952] [2022-11-03 02:04:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:15,295 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:15,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-03 02:04:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:04:16,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:17,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427606952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:19,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:19,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 28 [2022-11-03 02:04:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757593722] [2022-11-03 02:04:19,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:04:19,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:04:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:04:19,127 INFO L87 Difference]: Start difference. First operand 2472 states and 3453 transitions. Second operand has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:41,963 INFO L93 Difference]: Finished difference Result 108872 states and 152908 transitions. [2022-11-03 02:04:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-11-03 02:04:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 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 527 [2022-11-03 02:04:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:42,022 INFO L225 Difference]: With dead ends: 108872 [2022-11-03 02:04:42,023 INFO L226 Difference]: Without dead ends: 106532 [2022-11-03 02:04:42,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3298 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10957 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=5113, Invalid=23617, Unknown=0, NotChecked=0, Total=28730 [2022-11-03 02:04:42,034 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 42076 mSDsluCounter, 19799 mSDsCounter, 0 mSdLazyCounter, 6215 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42076 SdHoareTripleChecker+Valid, 20721 SdHoareTripleChecker+Invalid, 6751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 6215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42076 Valid, 20721 Invalid, 6751 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [536 Valid, 6215 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-03 02:04:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106532 states. [2022-11-03 02:04:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106532 to 9275. [2022-11-03 02:04:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9274 states have (on average 1.392063834375674) internal successors, (12910), 9274 states have internal predecessors, (12910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 12910 transitions. [2022-11-03 02:04:42,533 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 12910 transitions. Word has length 527 [2022-11-03 02:04:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:42,533 INFO L495 AbstractCegarLoop]: Abstraction has 9275 states and 12910 transitions. [2022-11-03 02:04:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 12910 transitions. [2022-11-03 02:04:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:04:42,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:42,547 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:04:42,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:42,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:42,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2022-11-03 02:04:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:43,161 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1376418823, now seen corresponding path program 1 times [2022-11-03 02:04:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:43,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023843008] [2022-11-03 02:04:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:43,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:43,165 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:43,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 02:04:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:04:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:47,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023843008] [2022-11-03 02:04:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023843008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641190919] [2022-11-03 02:04:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:47,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:47,054 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 02:04:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:04:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:04:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:04:54,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641190919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454470706] [2022-11-03 02:04:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:54,665 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:54,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-03 02:04:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:04:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:56,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:58,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454470706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:58,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:58,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:04:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903587978] [2022-11-03 02:04:58,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:58,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:04:58,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:04:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:04:58,123 INFO L87 Difference]: Start difference. First operand 9275 states and 12910 transitions. Second operand has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:36,745 INFO L93 Difference]: Finished difference Result 207639 states and 296158 transitions. [2022-11-03 02:05:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2022-11-03 02:05:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 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 527 [2022-11-03 02:05:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:37,003 INFO L225 Difference]: With dead ends: 207639 [2022-11-03 02:05:37,004 INFO L226 Difference]: Without dead ends: 198765 [2022-11-03 02:05:37,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3477 GetRequests, 3131 SyntacticMatches, 61 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38934 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=11924, Invalid=70158, Unknown=0, NotChecked=0, Total=82082 [2022-11-03 02:05:37,032 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 40967 mSDsluCounter, 20361 mSDsCounter, 0 mSdLazyCounter, 3396 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40967 SdHoareTripleChecker+Valid, 21445 SdHoareTripleChecker+Invalid, 12696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 3396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8863 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:37,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40967 Valid, 21445 Invalid, 12696 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [437 Valid, 3396 Invalid, 0 Unknown, 8863 Unchecked, 5.6s Time] [2022-11-03 02:05:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198765 states. [2022-11-03 02:05:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198765 to 11253. [2022-11-03 02:05:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11253 states, 11252 states have (on average 1.4049057945254178) internal successors, (15808), 11252 states have internal predecessors, (15808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11253 states to 11253 states and 15808 transitions. [2022-11-03 02:05:38,195 INFO L78 Accepts]: Start accepts. Automaton has 11253 states and 15808 transitions. Word has length 527 [2022-11-03 02:05:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:38,195 INFO L495 AbstractCegarLoop]: Abstraction has 11253 states and 15808 transitions. [2022-11-03 02:05:38,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 11253 states and 15808 transitions. [2022-11-03 02:05:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:05:38,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:38,206 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:38,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:38,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-03 02:05:38,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2022-11-03 02:05:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:38,807 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2126738685, now seen corresponding path program 1 times [2022-11-03 02:05:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732272785] [2022-11-03 02:05:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:38,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:38,811 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:38,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-03 02:05:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:05:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:41,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:42,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732272785] [2022-11-03 02:05:42,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732272785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395674437] [2022-11-03 02:05:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:42,937 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:42,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-03 02:05:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:05:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 51 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:05:47,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 51 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:05:50,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395674437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610940363] [2022-11-03 02:05:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:50,575 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-03 02:05:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:05:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:52,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:54,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610940363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:54,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:54,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:05:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792654871] [2022-11-03 02:05:54,079 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:05:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:05:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:05:54,081 INFO L87 Difference]: Start difference. First operand 11253 states and 15808 transitions. Second operand has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:26,341 INFO L93 Difference]: Finished difference Result 176011 states and 250061 transitions. [2022-11-03 02:06:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-11-03 02:06:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 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 527 [2022-11-03 02:06:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:26,491 INFO L225 Difference]: With dead ends: 176011 [2022-11-03 02:06:26,491 INFO L226 Difference]: Without dead ends: 165163 [2022-11-03 02:06:26,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3424 GetRequests, 3130 SyntacticMatches, 48 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26415 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=8932, Invalid=52324, Unknown=0, NotChecked=0, Total=61256 [2022-11-03 02:06:26,514 INFO L413 NwaCegarLoop]: 1367 mSDtfsCounter, 31740 mSDsluCounter, 24870 mSDsCounter, 0 mSdLazyCounter, 3860 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31740 SdHoareTripleChecker+Valid, 26237 SdHoareTripleChecker+Invalid, 12995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8888 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31740 Valid, 26237 Invalid, 12995 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [247 Valid, 3860 Invalid, 0 Unknown, 8888 Unchecked, 6.0s Time] [2022-11-03 02:06:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165163 states. [2022-11-03 02:06:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165163 to 11279. [2022-11-03 02:06:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11279 states, 11278 states have (on average 1.4039723355204823) internal successors, (15834), 11278 states have internal predecessors, (15834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11279 states to 11279 states and 15834 transitions. [2022-11-03 02:06:27,538 INFO L78 Accepts]: Start accepts. Automaton has 11279 states and 15834 transitions. Word has length 527 [2022-11-03 02:06:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:27,538 INFO L495 AbstractCegarLoop]: Abstraction has 11279 states and 15834 transitions. [2022-11-03 02:06:27,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11279 states and 15834 transitions. [2022-11-03 02:06:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:06:27,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:27,550 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:27,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:27,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Ended with exit code 0 [2022-11-03 02:06:28,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-11-03 02:06:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:28,173 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1918773503, now seen corresponding path program 1 times [2022-11-03 02:06:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491564742] [2022-11-03 02:06:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:28,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:28,177 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:28,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-03 02:06:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:06:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:06:30,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:06:31,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:06:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491564742] [2022-11-03 02:06:31,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491564742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090248008] [2022-11-03 02:06:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:06:31,927 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:06:31,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2022-11-03 02:06:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:06:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 53 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:06:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 53 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:06:39,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090248008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167336761] [2022-11-03 02:06:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:39,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:39,211 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:39,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-03 02:06:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:40,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:06:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:06:41,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:06:42,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167336761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:42,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:42,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:06:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366370370] [2022-11-03 02:06:42,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:42,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:06:42,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:06:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:06:42,748 INFO L87 Difference]: Start difference. First operand 11279 states and 15834 transitions. Second operand has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:13,607 INFO L93 Difference]: Finished difference Result 199877 states and 284005 transitions. [2022-11-03 02:07:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2022-11-03 02:07:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 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 527 [2022-11-03 02:07:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:13,733 INFO L225 Difference]: With dead ends: 199877 [2022-11-03 02:07:13,733 INFO L226 Difference]: Without dead ends: 189007 [2022-11-03 02:07:13,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3391 GetRequests, 3136 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23627 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=10007, Invalid=55273, Unknown=0, NotChecked=0, Total=65280 [2022-11-03 02:07:13,761 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 37382 mSDsluCounter, 18378 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37382 SdHoareTripleChecker+Valid, 19099 SdHoareTripleChecker+Invalid, 14136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10848 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:13,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37382 Valid, 19099 Invalid, 14136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [394 Valid, 2894 Invalid, 0 Unknown, 10848 Unchecked, 5.1s Time] [2022-11-03 02:07:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189007 states. [2022-11-03 02:07:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189007 to 28269. [2022-11-03 02:07:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28269 states, 28268 states have (on average 1.4192019244375265) internal successors, (40118), 28268 states have internal predecessors, (40118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28269 states to 28269 states and 40118 transitions. [2022-11-03 02:07:15,206 INFO L78 Accepts]: Start accepts. Automaton has 28269 states and 40118 transitions. Word has length 527 [2022-11-03 02:07:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:15,206 INFO L495 AbstractCegarLoop]: Abstraction has 28269 states and 40118 transitions. [2022-11-03 02:07:15,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28269 states and 40118 transitions. [2022-11-03 02:07:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:07:15,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:15,230 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:15,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:15,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (131)] Ended with exit code 0 [2022-11-03 02:07:15,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (132)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:15,857 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1442376197, now seen corresponding path program 1 times [2022-11-03 02:07:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242769691] [2022-11-03 02:07:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:15,861 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:15,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-03 02:07:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:17,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:07:18,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:07:20,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242769691] [2022-11-03 02:07:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242769691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2133132879] [2022-11-03 02:07:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:20,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:20,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:20,052 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:20,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2022-11-03 02:07:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:07:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 55 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:07:24,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 55 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:07:28,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2133132879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:28,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352524161] [2022-11-03 02:07:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:28,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:28,036 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-03 02:07:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:29,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:07:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:07:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352524161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:31,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:31,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:07:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285699388] [2022-11-03 02:07:31,596 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:31,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:07:31,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:07:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:07:31,599 INFO L87 Difference]: Start difference. First operand 28269 states and 40118 transitions. Second operand has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:04,271 INFO L93 Difference]: Finished difference Result 435241 states and 623093 transitions. [2022-11-03 02:08:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-11-03 02:08:04,272 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 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 527 [2022-11-03 02:08:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:04,536 INFO L225 Difference]: With dead ends: 435241 [2022-11-03 02:08:04,536 INFO L226 Difference]: Without dead ends: 409817 [2022-11-03 02:08:04,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3404 GetRequests, 3123 SyntacticMatches, 53 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24087 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=8678, Invalid=43992, Unknown=0, NotChecked=0, Total=52670 [2022-11-03 02:08:04,869 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 41771 mSDsluCounter, 19200 mSDsCounter, 0 mSdLazyCounter, 3374 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41771 SdHoareTripleChecker+Valid, 20023 SdHoareTripleChecker+Invalid, 12298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 3374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8543 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:04,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41771 Valid, 20023 Invalid, 12298 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [381 Valid, 3374 Invalid, 0 Unknown, 8543 Unchecked, 4.8s Time] [2022-11-03 02:08:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409817 states. [2022-11-03 02:08:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409817 to 28319. [2022-11-03 02:08:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28319 states, 28318 states have (on average 1.4186030086870542) internal successors, (40172), 28318 states have internal predecessors, (40172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28319 states to 28319 states and 40172 transitions. [2022-11-03 02:08:07,069 INFO L78 Accepts]: Start accepts. Automaton has 28319 states and 40172 transitions. Word has length 527 [2022-11-03 02:08:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:07,069 INFO L495 AbstractCegarLoop]: Abstraction has 28319 states and 40172 transitions. [2022-11-03 02:08:07,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28319 states and 40172 transitions. [2022-11-03 02:08:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:08:07,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:07,086 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:07,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (135)] Ended with exit code 0 [2022-11-03 02:08:07,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-03 02:08:07,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-03 02:08:07,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:07,687 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1874792951, now seen corresponding path program 1 times [2022-11-03 02:08:07,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:07,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714870592] [2022-11-03 02:08:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:07,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:07,691 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:07,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-03 02:08:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:08:09,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:08:10,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:08:11,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714870592] [2022-11-03 02:08:11,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714870592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633065212] [2022-11-03 02:08:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:11,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:08:11,474 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:08:11,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2022-11-03 02:08:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:08:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 131 proven. 57 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:08:16,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 131 proven. 57 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:08:18,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633065212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:18,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981980605] [2022-11-03 02:08:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:18,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:18,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:18,822 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:18,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-03 02:08:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:08:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:08:20,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:08:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981980605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:22,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 17, 17, 7, 7] total 40 [2022-11-03 02:08:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243783496] [2022-11-03 02:08:22,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:08:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:08:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:08:22,343 INFO L87 Difference]: Start difference. First operand 28319 states and 40172 transitions. Second operand has 40 states, 40 states have (on average 37.225) internal successors, (1489), 40 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:22,626 INFO L93 Difference]: Finished difference Result 498551 states and 712736 transitions. [2022-11-03 02:09:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-11-03 02:09:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 37.225) internal successors, (1489), 40 states have internal predecessors, (1489), 0 states have call successors, (0), 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 527 [2022-11-03 02:09:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:23,023 INFO L225 Difference]: With dead ends: 498551 [2022-11-03 02:09:23,023 INFO L226 Difference]: Without dead ends: 471265 [2022-11-03 02:09:23,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3623 GetRequests, 3133 SyntacticMatches, 102 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79575 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=24212, Invalid=127498, Unknown=0, NotChecked=0, Total=151710 [2022-11-03 02:09:23,101 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 64135 mSDsluCounter, 18116 mSDsCounter, 0 mSdLazyCounter, 3712 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64135 SdHoareTripleChecker+Valid, 18730 SdHoareTripleChecker+Invalid, 17125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 3712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12691 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:23,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64135 Valid, 18730 Invalid, 17125 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [722 Valid, 3712 Invalid, 0 Unknown, 12691 Unchecked, 6.0s Time] [2022-11-03 02:09:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471265 states. [2022-11-03 02:09:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471265 to 28379. [2022-11-03 02:09:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28379 states, 28378 states have (on average 1.4177179505250546) internal successors, (40232), 28378 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28379 states to 28379 states and 40232 transitions. [2022-11-03 02:09:26,365 INFO L78 Accepts]: Start accepts. Automaton has 28379 states and 40232 transitions. Word has length 527 [2022-11-03 02:09:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:26,365 INFO L495 AbstractCegarLoop]: Abstraction has 28379 states and 40232 transitions. [2022-11-03 02:09:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 37.225) internal successors, (1489), 40 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 28379 states and 40232 transitions. [2022-11-03 02:09:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:09:26,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:26,390 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:26,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (138)] Ended with exit code 0 [2022-11-03 02:09:26,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:26,991 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 227593103, now seen corresponding path program 1 times [2022-11-03 02:09:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:26,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630796941] [2022-11-03 02:09:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:26,997 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:26,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-03 02:09:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:29,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:31,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630796941] [2022-11-03 02:09:31,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630796941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453077967] [2022-11-03 02:09:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:31,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:31,403 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:31,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2022-11-03 02:09:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:09:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:09:33,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:33,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453077967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:33,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:09:33,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 15 [2022-11-03 02:09:33,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789998194] [2022-11-03 02:09:33,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:33,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:33,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:09:33,716 INFO L87 Difference]: Start difference. First operand 28379 states and 40232 transitions. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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 02:09:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:34,922 INFO L93 Difference]: Finished difference Result 103377 states and 146507 transitions. [2022-11-03 02:09:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:09:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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) Word has length 527 [2022-11-03 02:09:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:34,977 INFO L225 Difference]: With dead ends: 103377 [2022-11-03 02:09:34,977 INFO L226 Difference]: Without dead ends: 76367 [2022-11-03 02:09:34,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1568 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:09:34,990 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 1965 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:34,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1965 Valid, 1643 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:09:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76367 states. [2022-11-03 02:09:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76367 to 28379. [2022-11-03 02:09:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28379 states, 28378 states have (on average 1.4148988653182042) internal successors, (40152), 28378 states have internal predecessors, (40152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28379 states to 28379 states and 40152 transitions. [2022-11-03 02:09:35,761 INFO L78 Accepts]: Start accepts. Automaton has 28379 states and 40152 transitions. Word has length 527 [2022-11-03 02:09:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:35,762 INFO L495 AbstractCegarLoop]: Abstraction has 28379 states and 40152 transitions. [2022-11-03 02:09:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 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 02:09:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 28379 states and 40152 transitions. [2022-11-03 02:09:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:09:35,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:35,779 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:35,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-03 02:09:35,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (141)] Ended with exit code 0 [2022-11-03 02:09:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:36,180 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 225758737, now seen corresponding path program 1 times [2022-11-03 02:09:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553834729] [2022-11-03 02:09:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:36,185 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:36,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-03 02:09:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:38,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:40,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553834729] [2022-11-03 02:09:40,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553834729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1123940792] [2022-11-03 02:09:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:40,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:40,450 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:40,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-11-03 02:09:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:09:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 129 proven. 59 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:09:45,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 129 proven. 59 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:09:48,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1123940792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274813809] [2022-11-03 02:09:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:48,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:48,157 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:48,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a0246a5-9e89-4a20-b2ee-ef833c1bff8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-03 02:09:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:50,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 237 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:09:51,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274813809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:51,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:51,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 17, 17, 8, 8] total 41 [2022-11-03 02:09:51,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180506547] [2022-11-03 02:09:51,982 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:09:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:09:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:09:51,983 INFO L87 Difference]: Start difference. First operand 28379 states and 40152 transitions. Second operand has 41 states, 41 states have (on average 36.73170731707317) internal successors, (1506), 41 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)