./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c --- 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-2329fc7 [2022-12-14 03:08:19,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:08:19,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:08:19,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:08:19,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:08:19,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:08:19,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:08:19,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:08:19,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:08:19,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:08:19,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:08:19,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:08:19,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:08:19,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:08:19,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:08:19,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:08:19,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:08:19,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:08:19,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:08:19,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:08:19,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:08:19,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:08:19,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:08:19,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:08:19,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:08:19,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:08:19,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:08:19,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:08:19,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:08:19,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:08:19,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:08:19,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:08:19,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:08:19,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:08:19,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:08:19,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:08:19,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:08:19,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:08:19,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:08:19,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:08:19,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:08:19,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:08:19,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:08:19,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:08:19,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:08:19,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:08:19,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:08:19,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:08:19,614 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:08:19,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:08:19,615 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:08:19,615 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:08:19,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:08:19,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:08:19,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:19,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:08:19,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:08:19,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:08:19,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:08:19,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:08:19,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:08:19,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:08:19,618 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_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c [2022-12-14 03:08:19,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:08:19,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:08:19,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:08:19,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:08:19,803 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:08:19,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2022-12-14 03:08:22,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:08:22,577 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:08:22,578 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2022-12-14 03:08:22,588 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/data/6951c3ba2/8365848e61b14fa6aeb3d221566364a4/FLAG12f2a277d [2022-12-14 03:08:22,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/data/6951c3ba2/8365848e61b14fa6aeb3d221566364a4 [2022-12-14 03:08:22,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:08:22,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:08:22,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:22,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:08:22,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:08:22,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:22" (1/1) ... [2022-12-14 03:08:22,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273daadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:22, skipping insertion in model container [2022-12-14 03:08:22,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:22" (1/1) ... [2022-12-14 03:08:22,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:08:22,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:08:23,371 WARN L237 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_e07aa48b-8c00-424d-a198-b536ee517084/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2022-12-14 03:08:23,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:23,405 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:08:23,656 WARN L237 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_e07aa48b-8c00-424d-a198-b536ee517084/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2022-12-14 03:08:23,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:23,680 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:08:23,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23 WrapperNode [2022-12-14 03:08:23,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:23,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:23,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:08:23,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:08:23,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,773 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 03:08:23,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:23,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:08:23,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:08:23,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:08:23,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:08:23,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:08:23,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:08:23,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:08:23,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (1/1) ... [2022-12-14 03:08:23,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:23,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:23,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:08:23,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:08:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:08:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:08:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:08:23,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:08:24,008 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:08:24,010 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:08:25,218 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:08:25,444 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:08:25,445 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 03:08:25,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:25 BoogieIcfgContainer [2022-12-14 03:08:25,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:08:25,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:08:25,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:08:25,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:08:25,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:08:22" (1/3) ... [2022-12-14 03:08:25,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc3682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:25, skipping insertion in model container [2022-12-14 03:08:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:23" (2/3) ... [2022-12-14 03:08:25,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc3682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:25, skipping insertion in model container [2022-12-14 03:08:25,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:25" (3/3) ... [2022-12-14 03:08:25,454 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2022-12-14 03:08:25,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:08:25,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:08:25,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:08:25,520 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;@55467b15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:08:25,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:08:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 03:08:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:25,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:25,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash 209352442, now seen corresponding path program 1 times [2022-12-14 03:08:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368662343] [2022-12-14 03:08:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:26,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:26,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368662343] [2022-12-14 03:08:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368662343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:26,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:26,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:08:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75958187] [2022-12-14 03:08:26,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:26,219 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:26,935 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 03:08:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-12-14 03:08:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:26,945 INFO L225 Difference]: With dead ends: 440 [2022-12-14 03:08:26,945 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 03:08:26,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:26,950 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:26,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 03:08:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 03:08:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 03:08:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.6041666666666667) internal successors, (462), 288 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 462 transitions. [2022-12-14 03:08:26,993 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 462 transitions. Word has length 143 [2022-12-14 03:08:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:26,994 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 462 transitions. [2022-12-14 03:08:26,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 462 transitions. [2022-12-14 03:08:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 03:08:26,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:26,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:08:26,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1094392729, now seen corresponding path program 1 times [2022-12-14 03:08:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878024957] [2022-12-14 03:08:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:27,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:27,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878024957] [2022-12-14 03:08:27,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878024957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:27,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:27,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:08:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533845566] [2022-12-14 03:08:27,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:27,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:27,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:27,204 INFO L87 Difference]: Start difference. First operand 289 states and 462 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:27,707 INFO L93 Difference]: Finished difference Result 863 states and 1383 transitions. [2022-12-14 03:08:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 03:08:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:27,710 INFO L225 Difference]: With dead ends: 863 [2022-12-14 03:08:27,710 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 03:08:27,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:27,712 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:27,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:08:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 03:08:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 03:08:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5609756097560976) internal successors, (896), 574 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 896 transitions. [2022-12-14 03:08:27,742 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 896 transitions. Word has length 151 [2022-12-14 03:08:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:27,742 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 896 transitions. [2022-12-14 03:08:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 896 transitions. [2022-12-14 03:08:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 03:08:27,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:27,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-12-14 03:08:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:08:27,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash -316845794, now seen corresponding path program 1 times [2022-12-14 03:08:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596235754] [2022-12-14 03:08:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:08:28,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596235754] [2022-12-14 03:08:28,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596235754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:28,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:28,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:08:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945735744] [2022-12-14 03:08:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:28,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:08:28,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:08:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:28,290 INFO L87 Difference]: Start difference. First operand 575 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:28,988 INFO L93 Difference]: Finished difference Result 1290 states and 2054 transitions. [2022-12-14 03:08:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:08:28,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-12-14 03:08:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:28,991 INFO L225 Difference]: With dead ends: 1290 [2022-12-14 03:08:28,991 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 03:08:28,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:28,994 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:28,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 11 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 03:08:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 03:08:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 03:08:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3745644599303135) internal successors, (789), 574 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 789 transitions. [2022-12-14 03:08:29,011 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 789 transitions. Word has length 158 [2022-12-14 03:08:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:29,011 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 789 transitions. [2022-12-14 03:08:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 789 transitions. [2022-12-14 03:08:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 03:08:29,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:29,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 03:08:29,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -13280288, now seen corresponding path program 1 times [2022-12-14 03:08:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023478858] [2022-12-14 03:08:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:29,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023478858] [2022-12-14 03:08:29,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023478858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:29,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:29,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:08:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026163052] [2022-12-14 03:08:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:29,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:29,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:29,284 INFO L87 Difference]: Start difference. First operand 575 states and 789 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:29,760 INFO L93 Difference]: Finished difference Result 1723 states and 2365 transitions. [2022-12-14 03:08:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-12-14 03:08:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:29,765 INFO L225 Difference]: With dead ends: 1723 [2022-12-14 03:08:29,765 INFO L226 Difference]: Without dead ends: 1149 [2022-12-14 03:08:29,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:29,767 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:29,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 21 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:08:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-12-14 03:08:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-12-14 03:08:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.3490401396160558) internal successors, (1546), 1146 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1546 transitions. [2022-12-14 03:08:29,798 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1546 transitions. Word has length 171 [2022-12-14 03:08:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:29,798 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1546 transitions. [2022-12-14 03:08:29,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1546 transitions. [2022-12-14 03:08:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:08:29,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:29,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:29,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 03:08:29,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash 10694307, now seen corresponding path program 1 times [2022-12-14 03:08:29,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:29,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660208363] [2022-12-14 03:08:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:29,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:30,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:30,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660208363] [2022-12-14 03:08:30,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660208363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:30,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:08:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137161568] [2022-12-14 03:08:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:30,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:08:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:08:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:30,221 INFO L87 Difference]: Start difference. First operand 1147 states and 1546 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:31,096 INFO L93 Difference]: Finished difference Result 3006 states and 4062 transitions. [2022-12-14 03:08:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:08:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-14 03:08:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:31,101 INFO L225 Difference]: With dead ends: 3006 [2022-12-14 03:08:31,101 INFO L226 Difference]: Without dead ends: 1719 [2022-12-14 03:08:31,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:31,103 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 125 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:31,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 69 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 03:08:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-12-14 03:08:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-12-14 03:08:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.3329452852153667) internal successors, (2290), 1718 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2290 transitions. [2022-12-14 03:08:31,130 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2290 transitions. Word has length 174 [2022-12-14 03:08:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:31,130 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2290 transitions. [2022-12-14 03:08:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2290 transitions. [2022-12-14 03:08:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 03:08:31,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:31,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:31,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 03:08:31,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1441043326, now seen corresponding path program 1 times [2022-12-14 03:08:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454760237] [2022-12-14 03:08:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:31,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454760237] [2022-12-14 03:08:31,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454760237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:31,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077692609] [2022-12-14 03:08:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:31,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:31,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:08:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:31,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 03:08:31,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:31,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077692609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:31,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:31,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:31,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152819259] [2022-12-14 03:08:31,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:31,747 INFO L87 Difference]: Start difference. First operand 1719 states and 2290 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:32,234 INFO L93 Difference]: Finished difference Result 4009 states and 5362 transitions. [2022-12-14 03:08:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-12-14 03:08:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:32,238 INFO L225 Difference]: With dead ends: 4009 [2022-12-14 03:08:32,238 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 03:08:32,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:32,240 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:32,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 186 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:08:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 03:08:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-12-14 03:08:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3231441048034935) internal successors, (3030), 2290 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3030 transitions. [2022-12-14 03:08:32,271 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3030 transitions. Word has length 181 [2022-12-14 03:08:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:32,272 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3030 transitions. [2022-12-14 03:08:32,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3030 transitions. [2022-12-14 03:08:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 03:08:32,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:32,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:08:32,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 03:08:32,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1296190965, now seen corresponding path program 1 times [2022-12-14 03:08:32,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:32,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516378195] [2022-12-14 03:08:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:32,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:08:32,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516378195] [2022-12-14 03:08:32,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516378195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:32,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:32,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:08:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321435551] [2022-12-14 03:08:32,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:32,590 INFO L87 Difference]: Start difference. First operand 2291 states and 3030 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:33,105 INFO L93 Difference]: Finished difference Result 6583 states and 8764 transitions. [2022-12-14 03:08:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-12-14 03:08:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:33,113 INFO L225 Difference]: With dead ends: 6583 [2022-12-14 03:08:33,113 INFO L226 Difference]: Without dead ends: 4293 [2022-12-14 03:08:33,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:33,116 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 163 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:33,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 65 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:08:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-12-14 03:08:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2022-12-14 03:08:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.304520037278658) internal successors, (5599), 4292 states have internal predecessors, (5599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5599 transitions. [2022-12-14 03:08:33,170 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5599 transitions. Word has length 183 [2022-12-14 03:08:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:33,170 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 5599 transitions. [2022-12-14 03:08:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5599 transitions. [2022-12-14 03:08:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 03:08:33,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:33,175 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 03:08:33,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:33,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1930942352, now seen corresponding path program 1 times [2022-12-14 03:08:33,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:33,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937704138] [2022-12-14 03:08:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:08:33,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937704138] [2022-12-14 03:08:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937704138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926662999] [2022-12-14 03:08:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:33,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:33,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:08:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 03:08:33,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:33,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926662999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:33,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:33,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 03:08:33,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268805] [2022-12-14 03:08:33,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:33,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:33,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:33,627 INFO L87 Difference]: Start difference. First operand 4293 states and 5599 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:33,857 INFO L93 Difference]: Finished difference Result 12877 states and 16795 transitions. [2022-12-14 03:08:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-12-14 03:08:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:33,872 INFO L225 Difference]: With dead ends: 12877 [2022-12-14 03:08:33,872 INFO L226 Difference]: Without dead ends: 8585 [2022-12-14 03:08:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:33,876 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 188 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:33,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 324 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:08:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2022-12-14 03:08:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8583. [2022-12-14 03:08:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.2999300862269867) internal successors, (11156), 8582 states have internal predecessors, (11156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 11156 transitions. [2022-12-14 03:08:34,037 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 11156 transitions. Word has length 196 [2022-12-14 03:08:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:34,037 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 11156 transitions. [2022-12-14 03:08:34,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 11156 transitions. [2022-12-14 03:08:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-14 03:08:34,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:34,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 03:08:34,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:08:34,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 03:08:34,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1132187917, now seen corresponding path program 1 times [2022-12-14 03:08:34,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:34,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126685664] [2022-12-14 03:08:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 03:08:34,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126685664] [2022-12-14 03:08:34,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126685664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:34,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520340348] [2022-12-14 03:08:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:34,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:34,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:08:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:34,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:08:34,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:34,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520340348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:34,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:34,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:34,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107389947] [2022-12-14 03:08:34,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:34,625 INFO L87 Difference]: Start difference. First operand 8583 states and 11156 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:35,026 INFO L93 Difference]: Finished difference Result 20883 states and 27726 transitions. [2022-12-14 03:08:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-12-14 03:08:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:35,047 INFO L225 Difference]: With dead ends: 20883 [2022-12-14 03:08:35,047 INFO L226 Difference]: Without dead ends: 12301 [2022-12-14 03:08:35,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:35,053 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:35,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 224 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:08:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2022-12-14 03:08:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 12301. [2022-12-14 03:08:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 12300 states have (on average 1.2253658536585366) internal successors, (15072), 12300 states have internal predecessors, (15072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 15072 transitions. [2022-12-14 03:08:35,210 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 15072 transitions. Word has length 200 [2022-12-14 03:08:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:35,210 INFO L495 AbstractCegarLoop]: Abstraction has 12301 states and 15072 transitions. [2022-12-14 03:08:35,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 15072 transitions. [2022-12-14 03:08:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 03:08:35,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:35,218 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 03:08:35,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:08:35,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:35,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 256306805, now seen corresponding path program 1 times [2022-12-14 03:08:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:35,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037316272] [2022-12-14 03:08:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 03:08:35,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:35,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037316272] [2022-12-14 03:08:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037316272] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:35,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885329598] [2022-12-14 03:08:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:35,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:35,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:35,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:08:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 03:08:35,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885329598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:35,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:35,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597240271] [2022-12-14 03:08:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:35,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:35,930 INFO L87 Difference]: Start difference. First operand 12301 states and 15072 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:36,376 INFO L93 Difference]: Finished difference Result 32466 states and 39556 transitions. [2022-12-14 03:08:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-12-14 03:08:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:36,405 INFO L225 Difference]: With dead ends: 32466 [2022-12-14 03:08:36,405 INFO L226 Difference]: Without dead ends: 20166 [2022-12-14 03:08:36,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:36,413 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:36,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:08:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20166 states. [2022-12-14 03:08:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20166 to 19022. [2022-12-14 03:08:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19022 states, 19021 states have (on average 1.2180221860049418) internal successors, (23168), 19021 states have internal predecessors, (23168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19022 states to 19022 states and 23168 transitions. [2022-12-14 03:08:36,662 INFO L78 Accepts]: Start accepts. Automaton has 19022 states and 23168 transitions. Word has length 215 [2022-12-14 03:08:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:36,663 INFO L495 AbstractCegarLoop]: Abstraction has 19022 states and 23168 transitions. [2022-12-14 03:08:36,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19022 states and 23168 transitions. [2022-12-14 03:08:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 03:08:36,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:36,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 03:08:36,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:08:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 03:08:36,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:36,875 INFO L85 PathProgramCache]: Analyzing trace with hash -984653337, now seen corresponding path program 2 times [2022-12-14 03:08:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:36,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950648732] [2022-12-14 03:08:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 03:08:37,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950648732] [2022-12-14 03:08:37,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950648732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:37,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:37,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:08:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832979901] [2022-12-14 03:08:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:08:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:08:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:37,084 INFO L87 Difference]: Start difference. First operand 19022 states and 23168 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:37,796 INFO L93 Difference]: Finished difference Result 66502 states and 81073 transitions. [2022-12-14 03:08:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:08:37,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-12-14 03:08:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:37,852 INFO L225 Difference]: With dead ends: 66502 [2022-12-14 03:08:37,852 INFO L226 Difference]: Without dead ends: 47624 [2022-12-14 03:08:37,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:08:37,866 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 325 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:37,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 193 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:08:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47624 states. [2022-12-14 03:08:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47624 to 40186. [2022-12-14 03:08:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40186 states, 40185 states have (on average 1.2212268259300734) internal successors, (49075), 40185 states have internal predecessors, (49075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40186 states to 40186 states and 49075 transitions. [2022-12-14 03:08:38,376 INFO L78 Accepts]: Start accepts. Automaton has 40186 states and 49075 transitions. Word has length 215 [2022-12-14 03:08:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:38,376 INFO L495 AbstractCegarLoop]: Abstraction has 40186 states and 49075 transitions. [2022-12-14 03:08:38,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 40186 states and 49075 transitions. [2022-12-14 03:08:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-12-14 03:08:38,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:38,394 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-12-14 03:08:38,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 03:08:38,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 345775323, now seen corresponding path program 1 times [2022-12-14 03:08:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:38,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002779267] [2022-12-14 03:08:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 03:08:38,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:38,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002779267] [2022-12-14 03:08:38,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002779267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:38,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221933674] [2022-12-14 03:08:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:38,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:38,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:08:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:08:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 03:08:38,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:38,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221933674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:38,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:38,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:38,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759776744] [2022-12-14 03:08:38,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:38,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:38,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:38,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:38,901 INFO L87 Difference]: Start difference. First operand 40186 states and 49075 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:39,571 INFO L93 Difference]: Finished difference Result 98103 states and 119538 transitions. [2022-12-14 03:08:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-12-14 03:08:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:39,635 INFO L225 Difference]: With dead ends: 98103 [2022-12-14 03:08:39,635 INFO L226 Difference]: Without dead ends: 58061 [2022-12-14 03:08:39,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:39,657 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 128 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:39,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 193 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:08:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58061 states. [2022-12-14 03:08:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58061 to 56917. [2022-12-14 03:08:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56917 states, 56916 states have (on average 1.1950066765057277) internal successors, (68015), 56916 states have internal predecessors, (68015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56917 states to 56917 states and 68015 transitions. [2022-12-14 03:08:40,447 INFO L78 Accepts]: Start accepts. Automaton has 56917 states and 68015 transitions. Word has length 243 [2022-12-14 03:08:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:40,447 INFO L495 AbstractCegarLoop]: Abstraction has 56917 states and 68015 transitions. [2022-12-14 03:08:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56917 states and 68015 transitions. [2022-12-14 03:08:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-14 03:08:40,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:40,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:08:40,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:08:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:40,665 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash -214665486, now seen corresponding path program 1 times [2022-12-14 03:08:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993269981] [2022-12-14 03:08:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:40,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:08:40,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993269981] [2022-12-14 03:08:40,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993269981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:40,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530396967] [2022-12-14 03:08:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:40,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:40,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:40,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:08:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:08:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:08:41,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:41,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530396967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:41,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:41,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:41,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270047586] [2022-12-14 03:08:41,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:08:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:08:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:08:41,242 INFO L87 Difference]: Start difference. First operand 56917 states and 68015 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:42,399 INFO L93 Difference]: Finished difference Result 158737 states and 189578 transitions. [2022-12-14 03:08:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:08:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-12-14 03:08:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:42,519 INFO L225 Difference]: With dead ends: 158737 [2022-12-14 03:08:42,519 INFO L226 Difference]: Without dead ends: 101964 [2022-12-14 03:08:42,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:08:42,559 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 334 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:42,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 255 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:08:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101964 states. [2022-12-14 03:08:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101964 to 101390. [2022-12-14 03:08:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101390 states, 101389 states have (on average 1.1918551322135538) internal successors, (120841), 101389 states have internal predecessors, (120841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101390 states to 101390 states and 120841 transitions. [2022-12-14 03:08:43,920 INFO L78 Accepts]: Start accepts. Automaton has 101390 states and 120841 transitions. Word has length 252 [2022-12-14 03:08:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:43,921 INFO L495 AbstractCegarLoop]: Abstraction has 101390 states and 120841 transitions. [2022-12-14 03:08:43,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 101390 states and 120841 transitions. [2022-12-14 03:08:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-12-14 03:08:43,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:43,935 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:08:43,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:08:44,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:44,137 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1006217666, now seen corresponding path program 1 times [2022-12-14 03:08:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:44,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120596331] [2022-12-14 03:08:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 117 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 03:08:44,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120596331] [2022-12-14 03:08:44,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120596331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767314495] [2022-12-14 03:08:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:44,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:44,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:08:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:44,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 03:08:44,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767314495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:44,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:44,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561985254] [2022-12-14 03:08:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:44,842 INFO L87 Difference]: Start difference. First operand 101390 states and 120841 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:46,103 INFO L93 Difference]: Finished difference Result 211931 states and 255100 transitions. [2022-12-14 03:08:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2022-12-14 03:08:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:46,249 INFO L225 Difference]: With dead ends: 211931 [2022-12-14 03:08:46,249 INFO L226 Difference]: Without dead ends: 110685 [2022-12-14 03:08:46,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:46,311 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:46,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:08:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110685 states. [2022-12-14 03:08:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110685 to 110685. [2022-12-14 03:08:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110685 states, 110684 states have (on average 1.2053232626215171) internal successors, (133410), 110684 states have internal predecessors, (133410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110685 states to 110685 states and 133410 transitions. [2022-12-14 03:08:47,940 INFO L78 Accepts]: Start accepts. Automaton has 110685 states and 133410 transitions. Word has length 258 [2022-12-14 03:08:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 110685 states and 133410 transitions. [2022-12-14 03:08:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 110685 states and 133410 transitions. [2022-12-14 03:08:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-12-14 03:08:47,956 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:47,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-12-14 03:08:47,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:08:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 03:08:48,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 951004211, now seen corresponding path program 1 times [2022-12-14 03:08:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:48,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237945450] [2022-12-14 03:08:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:08:48,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:48,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237945450] [2022-12-14 03:08:48,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237945450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:48,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110064498] [2022-12-14 03:08:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:48,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:48,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:48,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:08:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:08:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 03:08:48,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:48,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110064498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:48,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:48,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 03:08:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878729453] [2022-12-14 03:08:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:48,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:48,853 INFO L87 Difference]: Start difference. First operand 110685 states and 133410 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:49,919 INFO L93 Difference]: Finished difference Result 249971 states and 300178 transitions. [2022-12-14 03:08:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2022-12-14 03:08:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:50,195 INFO L225 Difference]: With dead ends: 249971 [2022-12-14 03:08:50,195 INFO L226 Difference]: Without dead ends: 139430 [2022-12-14 03:08:50,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:50,230 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:50,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 70 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:08:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139430 states. [2022-12-14 03:08:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139430 to 137998. [2022-12-14 03:08:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137998 states, 137997 states have (on average 1.1781270607332044) internal successors, (162578), 137997 states have internal predecessors, (162578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137998 states to 137998 states and 162578 transitions. [2022-12-14 03:08:52,314 INFO L78 Accepts]: Start accepts. Automaton has 137998 states and 162578 transitions. Word has length 275 [2022-12-14 03:08:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:52,315 INFO L495 AbstractCegarLoop]: Abstraction has 137998 states and 162578 transitions. [2022-12-14 03:08:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 137998 states and 162578 transitions. [2022-12-14 03:08:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-12-14 03:08:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:52,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:08:52,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:08:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 03:08:52,671 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1582433494, now seen corresponding path program 1 times [2022-12-14 03:08:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451042370] [2022-12-14 03:08:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:53,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451042370] [2022-12-14 03:08:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451042370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:53,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:08:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657115467] [2022-12-14 03:08:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:53,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:53,107 INFO L87 Difference]: Start difference. First operand 137998 states and 162578 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:54,312 INFO L93 Difference]: Finished difference Result 275995 states and 325151 transitions. [2022-12-14 03:08:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-12-14 03:08:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:54,466 INFO L225 Difference]: With dead ends: 275995 [2022-12-14 03:08:54,466 INFO L226 Difference]: Without dead ends: 138141 [2022-12-14 03:08:54,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:08:54,531 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:54,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:08:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138141 states. [2022-12-14 03:08:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138141 to 138141. [2022-12-14 03:08:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138141 states, 138140 states have (on average 1.1779716229911683) internal successors, (162725), 138140 states have internal predecessors, (162725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138141 states to 138141 states and 162725 transitions. [2022-12-14 03:08:56,808 INFO L78 Accepts]: Start accepts. Automaton has 138141 states and 162725 transitions. Word has length 282 [2022-12-14 03:08:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:56,808 INFO L495 AbstractCegarLoop]: Abstraction has 138141 states and 162725 transitions. [2022-12-14 03:08:56,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 138141 states and 162725 transitions. [2022-12-14 03:08:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-12-14 03:08:56,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:56,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:08:56,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 03:08:56,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash -348122456, now seen corresponding path program 1 times [2022-12-14 03:08:56,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312074727] [2022-12-14 03:08:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:56,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 148 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 03:08:57,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:57,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312074727] [2022-12-14 03:08:57,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312074727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:08:57,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894536020] [2022-12-14 03:08:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:57,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:57,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:57,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:57,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:08:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:08:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 03:08:57,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:08:57,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894536020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:57,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:08:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:08:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170186867] [2022-12-14 03:08:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:57,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:08:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:08:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:57,412 INFO L87 Difference]: Start difference. First operand 138141 states and 162725 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:58,542 INFO L93 Difference]: Finished difference Result 271991 states and 319924 transitions. [2022-12-14 03:08:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:08:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-12-14 03:08:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:58,687 INFO L225 Difference]: With dead ends: 271991 [2022-12-14 03:08:58,687 INFO L226 Difference]: Without dead ends: 134137 [2022-12-14 03:08:58,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:58,751 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:58,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:08:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134137 states. [2022-12-14 03:09:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134137 to 120409. [2022-12-14 03:09:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120409 states, 120408 states have (on average 1.1479802006511195) internal successors, (138226), 120408 states have internal predecessors, (138226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120409 states to 120409 states and 138226 transitions. [2022-12-14 03:09:00,662 INFO L78 Accepts]: Start accepts. Automaton has 120409 states and 138226 transitions. Word has length 286 [2022-12-14 03:09:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:00,663 INFO L495 AbstractCegarLoop]: Abstraction has 120409 states and 138226 transitions. [2022-12-14 03:09:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 120409 states and 138226 transitions. [2022-12-14 03:09:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-12-14 03:09:00,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:00,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-12-14 03:09:00,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 03:09:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:09:00,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1580274447, now seen corresponding path program 1 times [2022-12-14 03:09:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:00,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252288440] [2022-12-14 03:09:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 185 proven. 11 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 03:09:01,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252288440] [2022-12-14 03:09:01,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252288440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843215265] [2022-12-14 03:09:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:01,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:01,336 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:09:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:09:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 03:09:01,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:09:01,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843215265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:01,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:01,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:09:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378833678] [2022-12-14 03:09:01,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:01,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:01,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:09:01,567 INFO L87 Difference]: Start difference. First operand 120409 states and 138226 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:02,654 INFO L93 Difference]: Finished difference Result 332625 states and 381429 transitions. [2022-12-14 03:09:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2022-12-14 03:09:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:02,883 INFO L225 Difference]: With dead ends: 332625 [2022-12-14 03:09:02,883 INFO L226 Difference]: Without dead ends: 212360 [2022-12-14 03:09:02,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:09:02,922 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:02,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 533 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:09:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212360 states. [2022-12-14 03:09:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212360 to 212358. [2022-12-14 03:09:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212358 states, 212357 states have (on average 1.1337653103029333) internal successors, (240763), 212357 states have internal predecessors, (240763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212358 states to 212358 states and 240763 transitions. [2022-12-14 03:09:06,049 INFO L78 Accepts]: Start accepts. Automaton has 212358 states and 240763 transitions. Word has length 318 [2022-12-14 03:09:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:06,049 INFO L495 AbstractCegarLoop]: Abstraction has 212358 states and 240763 transitions. [2022-12-14 03:09:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 212358 states and 240763 transitions. [2022-12-14 03:09:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-12-14 03:09:06,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:06,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-12-14 03:09:06,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 03:09:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:09:06,280 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1140975507, now seen corresponding path program 1 times [2022-12-14 03:09:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:06,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825933126] [2022-12-14 03:09:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 187 proven. 3 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 03:09:06,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825933126] [2022-12-14 03:09:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825933126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889375867] [2022-12-14 03:09:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:06,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:06,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:06,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:06,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 03:09:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:09:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:09:06,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:09:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889375867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:06,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:06,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:09:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592949001] [2022-12-14 03:09:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:09:06,913 INFO L87 Difference]: Start difference. First operand 212358 states and 240763 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:08,692 INFO L93 Difference]: Finished difference Result 443734 states and 503499 transitions. [2022-12-14 03:09:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2022-12-14 03:09:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:09,001 INFO L225 Difference]: With dead ends: 443734 [2022-12-14 03:09:09,001 INFO L226 Difference]: Without dead ends: 231520 [2022-12-14 03:09:09,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:09:09,090 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 101 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:09,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 202 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:09:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231520 states. [2022-12-14 03:09:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231520 to 226801. [2022-12-14 03:09:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226801 states, 226800 states have (on average 1.118994708994709) internal successors, (253788), 226800 states have internal predecessors, (253788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226801 states to 226801 states and 253788 transitions. [2022-12-14 03:09:12,521 INFO L78 Accepts]: Start accepts. Automaton has 226801 states and 253788 transitions. Word has length 325 [2022-12-14 03:09:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:12,521 INFO L495 AbstractCegarLoop]: Abstraction has 226801 states and 253788 transitions. [2022-12-14 03:09:12,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 226801 states and 253788 transitions. [2022-12-14 03:09:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-12-14 03:09:12,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:12,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:09:12,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 03:09:12,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:12,751 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2075381835, now seen corresponding path program 1 times [2022-12-14 03:09:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:12,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167897890] [2022-12-14 03:09:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:12,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 198 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:09:13,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167897890] [2022-12-14 03:09:13,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167897890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819170370] [2022-12-14 03:09:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:13,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:13,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:13,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:13,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 03:09:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:14,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:09:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:09:14,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:09:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819170370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:14,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:14,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:09:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930844639] [2022-12-14 03:09:14,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:14,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:09:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:09:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:09:14,354 INFO L87 Difference]: Start difference. First operand 226801 states and 253788 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:16,307 INFO L93 Difference]: Finished difference Result 470477 states and 526446 transitions. [2022-12-14 03:09:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:09:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 336 [2022-12-14 03:09:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:16,605 INFO L225 Difference]: With dead ends: 470477 [2022-12-14 03:09:16,605 INFO L226 Difference]: Without dead ends: 244249 [2022-12-14 03:09:16,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:09:16,686 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 238 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:16,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 184 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:09:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244249 states. [2022-12-14 03:09:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244249 to 229804. [2022-12-14 03:09:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229804 states, 229803 states have (on average 1.1179314456295175) internal successors, (256904), 229803 states have internal predecessors, (256904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229804 states to 229804 states and 256904 transitions. [2022-12-14 03:09:20,040 INFO L78 Accepts]: Start accepts. Automaton has 229804 states and 256904 transitions. Word has length 336 [2022-12-14 03:09:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 229804 states and 256904 transitions. [2022-12-14 03:09:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 229804 states and 256904 transitions. [2022-12-14 03:09:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-12-14 03:09:20,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:20,083 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:20,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 03:09:20,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:20,285 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1864852678, now seen corresponding path program 1 times [2022-12-14 03:09:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:20,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473885148] [2022-12-14 03:09:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:09:20,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473885148] [2022-12-14 03:09:20,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473885148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:20,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:09:20,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:09:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201291806] [2022-12-14 03:09:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:20,752 INFO L87 Difference]: Start difference. First operand 229804 states and 256904 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:22,682 INFO L93 Difference]: Finished difference Result 471905 states and 527661 transitions. [2022-12-14 03:09:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2022-12-14 03:09:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:23,075 INFO L225 Difference]: With dead ends: 471905 [2022-12-14 03:09:23,075 INFO L226 Difference]: Without dead ends: 242674 [2022-12-14 03:09:23,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:23,150 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 98 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:23,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 172 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:09:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242674 states. [2022-12-14 03:09:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242674 to 235810. [2022-12-14 03:09:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235810 states, 235809 states have (on average 1.117090526655047) internal successors, (263420), 235809 states have internal predecessors, (263420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235810 states to 235810 states and 263420 transitions. [2022-12-14 03:09:26,639 INFO L78 Accepts]: Start accepts. Automaton has 235810 states and 263420 transitions. Word has length 338 [2022-12-14 03:09:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:26,639 INFO L495 AbstractCegarLoop]: Abstraction has 235810 states and 263420 transitions. [2022-12-14 03:09:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 235810 states and 263420 transitions. [2022-12-14 03:09:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-12-14 03:09:26,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:26,667 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 03:09:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 03:09:26,667 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -710055924, now seen corresponding path program 1 times [2022-12-14 03:09:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708138271] [2022-12-14 03:09:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 03:09:27,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:27,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708138271] [2022-12-14 03:09:27,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708138271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:27,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:09:27,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:09:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342112868] [2022-12-14 03:09:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:27,256 INFO L87 Difference]: Start difference. First operand 235810 states and 263420 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:29,112 INFO L93 Difference]: Finished difference Result 471476 states and 526680 transitions. [2022-12-14 03:09:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2022-12-14 03:09:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:29,520 INFO L225 Difference]: With dead ends: 471476 [2022-12-14 03:09:29,521 INFO L226 Difference]: Without dead ends: 236239 [2022-12-14 03:09:29,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:29,599 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:29,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:09:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236239 states. [2022-12-14 03:09:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236239 to 236239. [2022-12-14 03:09:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236239 states, 236238 states have (on average 1.1169583216925305) internal successors, (263868), 236238 states have internal predecessors, (263868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236239 states to 236239 states and 263868 transitions. [2022-12-14 03:09:33,007 INFO L78 Accepts]: Start accepts. Automaton has 236239 states and 263868 transitions. Word has length 342 [2022-12-14 03:09:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:33,007 INFO L495 AbstractCegarLoop]: Abstraction has 236239 states and 263868 transitions. [2022-12-14 03:09:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 236239 states and 263868 transitions. [2022-12-14 03:09:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-12-14 03:09:33,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:33,036 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 03:09:33,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 03:09:33,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -374751669, now seen corresponding path program 1 times [2022-12-14 03:09:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286665758] [2022-12-14 03:09:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:33,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286665758] [2022-12-14 03:09:33,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286665758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:33,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:09:33,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:09:33,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005159098] [2022-12-14 03:09:33,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:33,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:33,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:33,515 INFO L87 Difference]: Start difference. First operand 236239 states and 263868 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:35,484 INFO L93 Difference]: Finished difference Result 496215 states and 554105 transitions. [2022-12-14 03:09:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2022-12-14 03:09:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:35,794 INFO L225 Difference]: With dead ends: 496215 [2022-12-14 03:09:35,795 INFO L226 Difference]: Without dead ends: 260978 [2022-12-14 03:09:35,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:35,880 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 125 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:35,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 85 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:09:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260978 states. [2022-12-14 03:09:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260978 to 258833. [2022-12-14 03:09:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258833 states, 258832 states have (on average 1.1161332447301724) internal successors, (288891), 258832 states have internal predecessors, (288891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258833 states to 258833 states and 288891 transitions. [2022-12-14 03:09:39,725 INFO L78 Accepts]: Start accepts. Automaton has 258833 states and 288891 transitions. Word has length 343 [2022-12-14 03:09:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:39,726 INFO L495 AbstractCegarLoop]: Abstraction has 258833 states and 288891 transitions. [2022-12-14 03:09:39,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 258833 states and 288891 transitions. [2022-12-14 03:09:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-12-14 03:09:39,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:39,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:39,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 03:09:39,769 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1588846569, now seen corresponding path program 1 times [2022-12-14 03:09:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:39,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298132907] [2022-12-14 03:09:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:40,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:40,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298132907] [2022-12-14 03:09:40,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298132907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:40,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:09:40,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:09:40,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801663477] [2022-12-14 03:09:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:40,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:40,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:40,179 INFO L87 Difference]: Start difference. First operand 258833 states and 288891 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:42,434 INFO L93 Difference]: Finished difference Result 565429 states and 630433 transitions. [2022-12-14 03:09:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:42,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2022-12-14 03:09:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:42,807 INFO L225 Difference]: With dead ends: 565429 [2022-12-14 03:09:42,807 INFO L226 Difference]: Without dead ends: 307598 [2022-12-14 03:09:42,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:09:42,893 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 92 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:42,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 63 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:09:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307598 states. [2022-12-14 03:09:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307598 to 301733. [2022-12-14 03:09:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301733 states, 301732 states have (on average 1.1106412312913447) internal successors, (335116), 301732 states have internal predecessors, (335116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301733 states to 301733 states and 335116 transitions. [2022-12-14 03:09:47,133 INFO L78 Accepts]: Start accepts. Automaton has 301733 states and 335116 transitions. Word has length 355 [2022-12-14 03:09:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:47,133 INFO L495 AbstractCegarLoop]: Abstraction has 301733 states and 335116 transitions. [2022-12-14 03:09:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 301733 states and 335116 transitions. [2022-12-14 03:09:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-12-14 03:09:47,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:47,184 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:09:47,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 03:09:47,184 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 942337503, now seen corresponding path program 1 times [2022-12-14 03:09:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881650827] [2022-12-14 03:09:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 222 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:09:48,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:48,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881650827] [2022-12-14 03:09:48,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881650827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:48,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389947109] [2022-12-14 03:09:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:48,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:48,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 03:09:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:09:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 03:09:49,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:09:49,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389947109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:49,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:49,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:09:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864064489] [2022-12-14 03:09:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:09:49,309 INFO L87 Difference]: Start difference. First operand 301733 states and 335116 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:51,462 INFO L93 Difference]: Finished difference Result 604609 states and 671469 transitions. [2022-12-14 03:09:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2022-12-14 03:09:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:51,864 INFO L225 Difference]: With dead ends: 604609 [2022-12-14 03:09:51,864 INFO L226 Difference]: Without dead ends: 303878 [2022-12-14 03:09:51,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:09:51,981 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:51,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 230 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:09:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303878 states. [2022-12-14 03:09:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303878 to 302448. [2022-12-14 03:09:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302448 states, 302447 states have (on average 1.1083793193518203) internal successors, (335226), 302447 states have internal predecessors, (335226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302448 states to 302448 states and 335226 transitions. [2022-12-14 03:09:56,396 INFO L78 Accepts]: Start accepts. Automaton has 302448 states and 335226 transitions. Word has length 360 [2022-12-14 03:09:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:56,397 INFO L495 AbstractCegarLoop]: Abstraction has 302448 states and 335226 transitions. [2022-12-14 03:09:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 302448 states and 335226 transitions. [2022-12-14 03:09:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-12-14 03:09:56,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:56,447 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 03:09:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:56,649 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1089011182, now seen corresponding path program 1 times [2022-12-14 03:09:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:56,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911745517] [2022-12-14 03:09:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:56,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 207 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:57,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911745517] [2022-12-14 03:09:57,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911745517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938699351] [2022-12-14 03:09:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:57,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:57,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:57,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 03:09:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:57,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:09:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:57,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:09:57,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938699351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:09:57,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:57,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 03:09:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449767107] [2022-12-14 03:09:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:09:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:09:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:09:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:09:57,678 INFO L87 Difference]: Start difference. First operand 302448 states and 335226 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:59,793 INFO L93 Difference]: Finished difference Result 612331 states and 678883 transitions. [2022-12-14 03:09:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:09:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 362 [2022-12-14 03:09:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:00,172 INFO L225 Difference]: With dead ends: 612331 [2022-12-14 03:10:00,172 INFO L226 Difference]: Without dead ends: 310742 [2022-12-14 03:10:00,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:10:00,297 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 82 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:00,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 85 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:10:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310742 states. [2022-12-14 03:10:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310742 to 308883. [2022-12-14 03:10:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308883 states, 308882 states have (on average 1.1077013228352575) internal successors, (342149), 308882 states have internal predecessors, (342149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308883 states to 308883 states and 342149 transitions. [2022-12-14 03:10:04,829 INFO L78 Accepts]: Start accepts. Automaton has 308883 states and 342149 transitions. Word has length 362 [2022-12-14 03:10:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:04,829 INFO L495 AbstractCegarLoop]: Abstraction has 308883 states and 342149 transitions. [2022-12-14 03:10:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 308883 states and 342149 transitions. [2022-12-14 03:10:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-12-14 03:10:05,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:05,068 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:10:05,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 03:10:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 03:10:05,270 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 158586149, now seen corresponding path program 1 times [2022-12-14 03:10:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:05,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410829501] [2022-12-14 03:10:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:10:05,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410829501] [2022-12-14 03:10:05,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410829501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:05,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:10:05,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:10:05,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240125436] [2022-12-14 03:10:05,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:05,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:10:05,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:10:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:05,642 INFO L87 Difference]: Start difference. First operand 308883 states and 342149 transitions. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:07,911 INFO L93 Difference]: Finished difference Result 620911 states and 687584 transitions. [2022-12-14 03:10:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:10:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-12-14 03:10:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:08,291 INFO L225 Difference]: With dead ends: 620911 [2022-12-14 03:10:08,291 INFO L226 Difference]: Without dead ends: 312887 [2022-12-14 03:10:08,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:08,410 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 208 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:08,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 11 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:10:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312887 states. [2022-12-14 03:10:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312887 to 301304. [2022-12-14 03:10:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301304 states, 301303 states have (on average 1.1037825710331461) internal successors, (332573), 301303 states have internal predecessors, (332573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301304 states to 301304 states and 332573 transitions. [2022-12-14 03:10:12,768 INFO L78 Accepts]: Start accepts. Automaton has 301304 states and 332573 transitions. Word has length 366 [2022-12-14 03:10:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:12,769 INFO L495 AbstractCegarLoop]: Abstraction has 301304 states and 332573 transitions. [2022-12-14 03:10:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 301304 states and 332573 transitions. [2022-12-14 03:10:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-12-14 03:10:12,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:12,823 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 03:10:12,823 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -562291665, now seen corresponding path program 1 times [2022-12-14 03:10:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151891419] [2022-12-14 03:10:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 03:10:13,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:13,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151891419] [2022-12-14 03:10:13,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151891419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:10:13,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:10:13,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:10:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377996642] [2022-12-14 03:10:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:10:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:10:13,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:10:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:10:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:13,138 INFO L87 Difference]: Start difference. First operand 301304 states and 332573 transitions. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:10:15,746 INFO L93 Difference]: Finished difference Result 606468 states and 670214 transitions. [2022-12-14 03:10:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:10:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 370 [2022-12-14 03:10:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:10:16,116 INFO L225 Difference]: With dead ends: 606468 [2022-12-14 03:10:16,116 INFO L226 Difference]: Without dead ends: 306023 [2022-12-14 03:10:16,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:10:16,216 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 221 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:10:16,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 10 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:10:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306023 states. [2022-12-14 03:10:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306023 to 294297. [2022-12-14 03:10:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294297 states, 294296 states have (on average 1.0992843939435126) internal successors, (323515), 294296 states have internal predecessors, (323515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294297 states to 294297 states and 323515 transitions. [2022-12-14 03:10:20,317 INFO L78 Accepts]: Start accepts. Automaton has 294297 states and 323515 transitions. Word has length 370 [2022-12-14 03:10:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:10:20,317 INFO L495 AbstractCegarLoop]: Abstraction has 294297 states and 323515 transitions. [2022-12-14 03:10:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:10:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 294297 states and 323515 transitions. [2022-12-14 03:10:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-12-14 03:10:20,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:10:20,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:10:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 03:10:20,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:10:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:10:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2038892579, now seen corresponding path program 1 times [2022-12-14 03:10:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:10:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466721104] [2022-12-14 03:10:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:10:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 329 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 03:10:20,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:10:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466721104] [2022-12-14 03:10:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466721104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:10:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698881744] [2022-12-14 03:10:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:10:20,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:10:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:10:20,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:10:20,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e07aa48b-8c00-424d-a198-b536ee517084/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 03:10:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:10:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:10:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:10:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 268 proven. 40 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 03:10:21,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:10:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 268 proven. 40 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 03:10:21,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698881744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:10:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152186120] [2022-12-14 03:10:21,456 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 03:10:21,456 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:10:21,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:10:21,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:10:21,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs