./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:35:02,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:35:02,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:35:02,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:35:02,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:35:02,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:35:02,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:35:02,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:35:02,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:35:02,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:35:02,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:35:02,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:35:02,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:35:02,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:35:02,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:35:02,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:35:02,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:35:02,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:35:02,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:35:02,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:35:02,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:35:02,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:35:02,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:35:02,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:35:02,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:35:02,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:35:02,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:35:02,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:35:02,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:35:02,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:35:02,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:35:02,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:35:02,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:35:02,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:35:02,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:35:02,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:35:02,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:35:02,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:35:02,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:35:02,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:35:02,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:35:02,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:35:02,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:35:02,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:35:02,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:35:02,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:35:02,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:35:02,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:35:02,619 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:35:02,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:35:02,619 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:35:02,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:35:02,621 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:35:02,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:35:02,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:35:02,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:35:02,622 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:35:02,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:35:02,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:35:02,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:35:02,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:35:02,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:35:02,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:35:02,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:35:02,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:35:02,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:35:02,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:35:02,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:35:02,626 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:35:02,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:35:02,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:35:02,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:35:02,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:35:02,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:35:02,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:35:02,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:35:02,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:35:02,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:35:02,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:35:02,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:35:02,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:35:02,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:35:02,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:35:02,632 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_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2022-11-03 03:35:03,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:35:03,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:35:03,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:35:03,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:35:03,059 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:35:03,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2022-11-03 03:35:03,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cd34bd717/25a418574511418b94b4d245c6d4bf93/FLAGed3996d38 [2022-11-03 03:35:03,882 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:35:03,885 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2022-11-03 03:35:03,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cd34bd717/25a418574511418b94b4d245c6d4bf93/FLAGed3996d38 [2022-11-03 03:35:03,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cd34bd717/25a418574511418b94b4d245c6d4bf93 [2022-11-03 03:35:04,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:35:04,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:35:04,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:35:04,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:35:04,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:35:04,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:35:03" (1/1) ... [2022-11-03 03:35:04,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e97d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04, skipping insertion in model container [2022-11-03 03:35:04,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:35:03" (1/1) ... [2022-11-03 03:35:04,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:35:04,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:35:04,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2022-11-03 03:35:04,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:35:04,709 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:35:04,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2022-11-03 03:35:04,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:35:04,866 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:35:04,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04 WrapperNode [2022-11-03 03:35:04,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:35:04,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:35:04,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:35:04,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:35:04,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:04,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:04,979 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 911 [2022-11-03 03:35:04,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:35:04,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:35:04,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:35:04,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:35:04,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:04,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,095 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:35:05,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:35:05,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:35:05,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:35:05,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (1/1) ... [2022-11-03 03:35:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:35:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:05,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:35:05,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:35:05,253 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 03:35:05,254 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 03:35:05,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:35:05,255 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:35:05,255 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:35:05,255 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:35:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:35:05,256 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:35:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:35:05,256 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:35:05,256 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:35:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:35:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:35:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:35:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:35:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:35:05,258 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:35:05,258 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:35:05,258 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:35:05,258 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:35:05,258 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:35:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:35:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:35:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:35:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:35:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:35:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:35:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:35:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:35:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:35:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:35:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:35:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:35:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:35:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:35:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:35:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:35:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:35:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:35:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:35:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:35:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:35:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:35:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:35:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:35:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:35:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:35:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:35:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:35:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:35:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:35:05,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:35:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 03:35:05,269 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 03:35:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:35:05,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:35:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:35:05,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:35:05,500 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:35:05,503 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:35:07,117 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:35:08,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:35:08,003 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:35:08,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:35:08 BoogieIcfgContainer [2022-11-03 03:35:08,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:35:08,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:35:08,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:35:08,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:35:08,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:35:03" (1/3) ... [2022-11-03 03:35:08,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93bba86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:35:08, skipping insertion in model container [2022-11-03 03:35:08,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:35:04" (2/3) ... [2022-11-03 03:35:08,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93bba86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:35:08, skipping insertion in model container [2022-11-03 03:35:08,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:35:08" (3/3) ... [2022-11-03 03:35:08,025 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2022-11-03 03:35:08,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:35:08,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:35:08,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:35:08,183 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;@22318a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:35:08,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:35:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 03:35:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:35:08,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:08,239 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:35:08,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1891006212, now seen corresponding path program 1 times [2022-11-03 03:35:08,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749616999] [2022-11-03 03:35:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:35:08,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:08,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749616999] [2022-11-03 03:35:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749616999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:08,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:08,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:35:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853707845] [2022-11-03 03:35:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:35:08,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:35:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:35:09,040 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 03:35:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:09,302 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2022-11-03 03:35:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:35:09,306 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2022-11-03 03:35:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:09,332 INFO L225 Difference]: With dead ends: 422 [2022-11-03 03:35:09,332 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 03:35:09,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:35:09,339 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:09,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:35:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 03:35:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-03 03:35:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 268 states have (on average 1.5597014925373134) internal successors, (418), 287 states have internal predecessors, (418), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:35:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 623 transitions. [2022-11-03 03:35:09,446 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 623 transitions. Word has length 88 [2022-11-03 03:35:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:09,451 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 623 transitions. [2022-11-03 03:35:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 03:35:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 623 transitions. [2022-11-03 03:35:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 03:35:09,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:09,456 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-03 03:35:09,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:35:09,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 841970578, now seen corresponding path program 1 times [2022-11-03 03:35:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:09,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061831515] [2022-11-03 03:35:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:35:10,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061831515] [2022-11-03 03:35:10,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061831515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:10,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:10,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:35:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22577764] [2022-11-03 03:35:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:35:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:35:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:35:10,274 INFO L87 Difference]: Start difference. First operand 400 states and 623 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:35:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:13,352 INFO L93 Difference]: Finished difference Result 1217 states and 1930 transitions. [2022-11-03 03:35:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:35:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-03 03:35:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:13,364 INFO L225 Difference]: With dead ends: 1217 [2022-11-03 03:35:13,364 INFO L226 Difference]: Without dead ends: 840 [2022-11-03 03:35:13,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:35:13,371 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 1192 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:13,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 1869 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:35:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-03 03:35:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2022-11-03 03:35:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 540 states have (on average 1.5740740740740742) internal successors, (850), 573 states have internal predecessors, (850), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-03 03:35:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1253 transitions. [2022-11-03 03:35:13,473 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1253 transitions. Word has length 89 [2022-11-03 03:35:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:13,474 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1253 transitions. [2022-11-03 03:35:13,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:35:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1253 transitions. [2022-11-03 03:35:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:35:13,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:13,480 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-03 03:35:13,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:35:13,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1641248, now seen corresponding path program 1 times [2022-11-03 03:35:13,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:13,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719170451] [2022-11-03 03:35:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:13,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:35:13,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719170451] [2022-11-03 03:35:13,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719170451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:13,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:13,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:35:13,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814304152] [2022-11-03 03:35:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:35:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:35:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:35:13,837 INFO L87 Difference]: Start difference. First operand 791 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:35:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:14,509 INFO L93 Difference]: Finished difference Result 862 states and 1365 transitions. [2022-11-03 03:35:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:35:14,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-11-03 03:35:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:14,517 INFO L225 Difference]: With dead ends: 862 [2022-11-03 03:35:14,517 INFO L226 Difference]: Without dead ends: 847 [2022-11-03 03:35:14,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:35:14,519 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 715 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:14,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1547 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:35:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-03 03:35:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 795. [2022-11-03 03:35:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5698529411764706) internal successors, (854), 577 states have internal predecessors, (854), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-03 03:35:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1257 transitions. [2022-11-03 03:35:14,606 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1257 transitions. Word has length 93 [2022-11-03 03:35:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:14,607 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1257 transitions. [2022-11-03 03:35:14,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:35:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1257 transitions. [2022-11-03 03:35:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:35:14,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:14,611 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:14,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:35:14,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1200315626, now seen corresponding path program 1 times [2022-11-03 03:35:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:14,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340769904] [2022-11-03 03:35:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:35:15,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340769904] [2022-11-03 03:35:15,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340769904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:15,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:15,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:35:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247132489] [2022-11-03 03:35:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:15,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:35:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:35:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:35:15,025 INFO L87 Difference]: Start difference. First operand 795 states and 1257 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 03:35:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:15,277 INFO L93 Difference]: Finished difference Result 814 states and 1281 transitions. [2022-11-03 03:35:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:35:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2022-11-03 03:35:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:15,291 INFO L225 Difference]: With dead ends: 814 [2022-11-03 03:35:15,292 INFO L226 Difference]: Without dead ends: 799 [2022-11-03 03:35:15,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:35:15,303 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 41 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2889 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:15,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2889 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:35:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-03 03:35:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2022-11-03 03:35:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5661764705882353) internal successors, (852), 577 states have internal predecessors, (852), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-03 03:35:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1255 transitions. [2022-11-03 03:35:15,411 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1255 transitions. Word has length 98 [2022-11-03 03:35:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:15,412 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1255 transitions. [2022-11-03 03:35:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 03:35:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1255 transitions. [2022-11-03 03:35:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 03:35:15,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:15,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:35:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:35:15,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 826927623, now seen corresponding path program 1 times [2022-11-03 03:35:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212523176] [2022-11-03 03:35:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:35:18,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212523176] [2022-11-03 03:35:18,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212523176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138920991] [2022-11-03 03:35:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:18,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:18,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:18,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:18,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:35:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:35:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:35:19,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138920991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:19,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:19,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2022-11-03 03:35:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750543748] [2022-11-03 03:35:19,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:35:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:35:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:35:19,457 INFO L87 Difference]: Start difference. First operand 795 states and 1255 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 03:35:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:19,693 INFO L93 Difference]: Finished difference Result 878 states and 1379 transitions. [2022-11-03 03:35:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:35:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2022-11-03 03:35:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:19,701 INFO L225 Difference]: With dead ends: 878 [2022-11-03 03:35:19,702 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 03:35:19,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:35:19,704 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 44 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:19,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1816 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:35:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 03:35:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 799. [2022-11-03 03:35:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 548 states have (on average 1.562043795620438) internal successors, (856), 581 states have internal predecessors, (856), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-03 03:35:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2022-11-03 03:35:19,768 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 105 [2022-11-03 03:35:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:19,769 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2022-11-03 03:35:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 03:35:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2022-11-03 03:35:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:35:19,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:19,773 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 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] [2022-11-03 03:35:19,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:19,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:19,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash -205965631, now seen corresponding path program 1 times [2022-11-03 03:35:19,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:19,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605068496] [2022-11-03 03:35:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:35:22,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605068496] [2022-11-03 03:35:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605068496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082137480] [2022-11-03 03:35:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:22,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:22,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:35:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 03:35:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:35:24,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:18,417 WARN L234 SmtUtils]: Spent 48.78s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:37:07,604 WARN L234 SmtUtils]: Spent 48.48s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:37:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:37:08,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082137480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:08,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091346180] [2022-11-03 03:37:08,480 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-03 03:37:08,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:37:08,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:37:08,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:37:08,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:37:20,173 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 475 for LOIs [2022-11-03 03:37:20,489 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2022-11-03 03:37:28,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:37:28,623 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:37:28,626 INFO L158 Benchmark]: Toolchain (without parser) took 144624.17ms. Allocated memory was 138.4MB in the beginning and 662.7MB in the end (delta: 524.3MB). Free memory was 99.8MB in the beginning and 497.3MB in the end (delta: -397.5MB). Peak memory consumption was 409.5MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,626 INFO L158 Benchmark]: CDTParser took 1.24ms. Allocated memory is still 138.4MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:37:28,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 859.91ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 86.5MB in the end (delta: 13.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 111.39ms. Allocated memory is still 138.4MB. Free memory was 86.5MB in the beginning and 80.8MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,627 INFO L158 Benchmark]: Boogie Preprocessor took 153.98ms. Allocated memory is still 138.4MB. Free memory was 80.8MB in the beginning and 75.1MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,627 INFO L158 Benchmark]: RCFGBuilder took 2874.89ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 75.1MB in the beginning and 71.8MB in the end (delta: 3.4MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,627 INFO L158 Benchmark]: TraceAbstraction took 140611.95ms. Allocated memory was 184.5MB in the beginning and 662.7MB in the end (delta: 478.2MB). Free memory was 71.8MB in the beginning and 497.3MB in the end (delta: -425.5MB). Peak memory consumption was 336.1MB. Max. memory is 16.1GB. [2022-11-03 03:37:28,629 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.24ms. Allocated memory is still 138.4MB. Free memory is still 119.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 859.91ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 86.5MB in the end (delta: 13.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 111.39ms. Allocated memory is still 138.4MB. Free memory was 86.5MB in the beginning and 80.8MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 153.98ms. Allocated memory is still 138.4MB. Free memory was 80.8MB in the beginning and 75.1MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2874.89ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 75.1MB in the beginning and 71.8MB in the end (delta: 3.4MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * TraceAbstraction took 140611.95ms. Allocated memory was 184.5MB in the beginning and 662.7MB in the end (delta: 478.2MB). Free memory was 71.8MB in the beginning and 497.3MB in the end (delta: -425.5MB). Peak memory consumption was 336.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:37:28,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:37:31,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:37:31,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:37:31,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:37:31,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:37:31,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:37:31,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:37:31,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:37:31,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:37:31,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:37:31,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:37:31,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:37:31,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:37:31,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:37:31,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:37:31,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:37:31,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:37:31,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:37:31,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:37:31,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:37:31,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:37:31,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:37:31,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:37:31,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:37:31,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:37:31,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:37:31,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:37:31,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:37:31,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:37:31,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:37:31,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:37:31,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:37:31,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:37:31,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:37:31,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:37:31,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:37:31,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:37:31,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:37:31,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:37:31,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:37:31,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:37:31,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:37:31,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:37:31,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:37:31,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:37:31,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:37:31,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:37:31,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:37:31,314 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:37:31,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:37:31,314 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:37:31,315 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:37:31,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:37:31,316 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:37:31,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:37:31,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:37:31,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:37:31,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:37:31,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:37:31,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:37:31,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:37:31,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:37:31,320 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:37:31,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:37:31,320 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:37:31,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:37:31,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:37:31,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:37:31,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:37:31,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:37:31,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:37:31,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:37:31,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:37:31,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:37:31,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:37:31,323 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:37:31,323 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:31,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:37:31,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:37:31,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:37:31,324 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2022-11-03 03:37:31,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:37:31,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:37:31,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:37:31,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:37:31,720 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:37:31,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2022-11-03 03:37:31,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cbecdd881/e4cd00fbfdc54a62bb3637c6fb8d9626/FLAG50a0a09e3 [2022-11-03 03:37:32,501 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:37:32,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2022-11-03 03:37:32,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cbecdd881/e4cd00fbfdc54a62bb3637c6fb8d9626/FLAG50a0a09e3 [2022-11-03 03:37:32,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/data/cbecdd881/e4cd00fbfdc54a62bb3637c6fb8d9626 [2022-11-03 03:37:32,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:37:32,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:37:32,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:37:32,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:37:32,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:37:32,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:37:32" (1/1) ... [2022-11-03 03:37:32,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cdd4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:32, skipping insertion in model container [2022-11-03 03:37:32,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:37:32" (1/1) ... [2022-11-03 03:37:32,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:37:32,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:37:33,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2022-11-03 03:37:33,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:37:33,538 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:37:33,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:37:33,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2022-11-03 03:37:33,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:37:33,787 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:37:33,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2022-11-03 03:37:33,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:37:34,013 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:37:34,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34 WrapperNode [2022-11-03 03:37:34,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:37:34,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:37:34,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:37:34,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:37:34,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,136 INFO L138 Inliner]: procedures = 98, calls = 348, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 855 [2022-11-03 03:37:34,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:37:34,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:37:34,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:37:34,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:37:34,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:37:34,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:37:34,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:37:34,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:37:34,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (1/1) ... [2022-11-03 03:37:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:37:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:34,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:37:34,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:37:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:37:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:37:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:37:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:37:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:37:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:37:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:37:34,337 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:37:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:37:34,337 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:37:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:37:34,337 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:37:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:37:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:37:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:37:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:37:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:37:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:37:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:37:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:37:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 03:37:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 03:37:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:37:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:37:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:37:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:37:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:37:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:37:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:37:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:37:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:37:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:37:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:37:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:37:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:37:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:37:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:37:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:37:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:37:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:37:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:37:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:37:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:37:34,346 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:37:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:37:34,348 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:37:34,348 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:37:34,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:37:34,350 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:37:34,350 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:37:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:37:34,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:37:34,351 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 03:37:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 03:37:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:37:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:37:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:37:34,353 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:37:34,581 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:37:34,584 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:37:36,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:37:36,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:37:36,498 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:37:36,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:37:36 BoogieIcfgContainer [2022-11-03 03:37:36,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:37:36,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:37:36,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:37:36,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:37:36,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:37:32" (1/3) ... [2022-11-03 03:37:36,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb36643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:37:36, skipping insertion in model container [2022-11-03 03:37:36,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:37:34" (2/3) ... [2022-11-03 03:37:36,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb36643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:37:36, skipping insertion in model container [2022-11-03 03:37:36,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:37:36" (3/3) ... [2022-11-03 03:37:36,515 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2022-11-03 03:37:36,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:37:36,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:37:36,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:37:36,705 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;@23aa2028, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:37:36,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:37:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 03:37:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:37:36,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:36,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:36,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -185393638, now seen corresponding path program 1 times [2022-11-03 03:37:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727919826] [2022-11-03 03:37:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:36,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:36,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:36,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:37:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:37:37,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:37:37,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:37,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727919826] [2022-11-03 03:37:37,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727919826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:37,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:37,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:37:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073028430] [2022-11-03 03:37:37,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:37,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:37:37,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:37:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:37:37,605 INFO L87 Difference]: Start difference. First operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 03:37:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:37,712 INFO L93 Difference]: Finished difference Result 615 states and 1010 transitions. [2022-11-03 03:37:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:37:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2022-11-03 03:37:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:37,737 INFO L225 Difference]: With dead ends: 615 [2022-11-03 03:37:37,737 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 03:37:37,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:37:37,745 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:37,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 03:37:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-11-03 03:37:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.671806167400881) internal successors, (759), 473 states have internal predecessors, (759), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 964 transitions. [2022-11-03 03:37:37,840 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 964 transitions. Word has length 127 [2022-11-03 03:37:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 964 transitions. [2022-11-03 03:37:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 03:37:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 964 transitions. [2022-11-03 03:37:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:37:37,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:37,851 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:37,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:38,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1127490313, now seen corresponding path program 1 times [2022-11-03 03:37:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:38,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768476971] [2022-11-03 03:37:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:38,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:38,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:37:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:38,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:38,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:38,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768476971] [2022-11-03 03:37:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768476971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:38,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:38,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753937478] [2022-11-03 03:37:38,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:38,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:38,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:38,796 INFO L87 Difference]: Start difference. First operand 586 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:38,916 INFO L93 Difference]: Finished difference Result 1163 states and 1920 transitions. [2022-11-03 03:37:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:38,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2022-11-03 03:37:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:38,923 INFO L225 Difference]: With dead ends: 1163 [2022-11-03 03:37:38,923 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 03:37:38,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:38,931 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 14 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:38,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 03:37:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-11-03 03:37:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.669603524229075) internal successors, (758), 473 states have internal predecessors, (758), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 963 transitions. [2022-11-03 03:37:38,971 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 963 transitions. Word has length 129 [2022-11-03 03:37:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:38,972 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 963 transitions. [2022-11-03 03:37:38,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 963 transitions. [2022-11-03 03:37:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 03:37:38,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:38,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:39,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:39,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2130311401, now seen corresponding path program 1 times [2022-11-03 03:37:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:39,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067235123] [2022-11-03 03:37:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:39,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:39,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:39,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:37:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:39,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:39,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:39,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:39,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067235123] [2022-11-03 03:37:39,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067235123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:39,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:39,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193307115] [2022-11-03 03:37:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:39,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:39,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:39,744 INFO L87 Difference]: Start difference. First operand 586 states and 963 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:39,861 INFO L93 Difference]: Finished difference Result 1163 states and 1918 transitions. [2022-11-03 03:37:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2022-11-03 03:37:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:39,868 INFO L225 Difference]: With dead ends: 1163 [2022-11-03 03:37:39,869 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 03:37:39,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:39,876 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 12 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:39,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2843 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 03:37:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-11-03 03:37:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 473 states have internal predecessors, (757), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 962 transitions. [2022-11-03 03:37:39,942 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 962 transitions. Word has length 131 [2022-11-03 03:37:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:39,942 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 962 transitions. [2022-11-03 03:37:39,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 962 transitions. [2022-11-03 03:37:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:37:39,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:39,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:39,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:40,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:40,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1124320887, now seen corresponding path program 1 times [2022-11-03 03:37:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:40,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880541274] [2022-11-03 03:37:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:40,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:40,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:40,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:37:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:40,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:40,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880541274] [2022-11-03 03:37:40,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880541274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:40,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:40,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686864947] [2022-11-03 03:37:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:40,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:40,761 INFO L87 Difference]: Start difference. First operand 586 states and 962 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:40,860 INFO L93 Difference]: Finished difference Result 1167 states and 1921 transitions. [2022-11-03 03:37:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:37:40,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2022-11-03 03:37:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:40,865 INFO L225 Difference]: With dead ends: 1167 [2022-11-03 03:37:40,866 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 03:37:40,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:40,870 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 13 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:40,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 03:37:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-11-03 03:37:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6601307189542485) internal successors, (762), 478 states have internal predecessors, (762), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 967 transitions. [2022-11-03 03:37:40,912 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 967 transitions. Word has length 133 [2022-11-03 03:37:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:40,913 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 967 transitions. [2022-11-03 03:37:40,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 967 transitions. [2022-11-03 03:37:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:37:40,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:40,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:40,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:41,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:41,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1149847903, now seen corresponding path program 1 times [2022-11-03 03:37:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:41,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752173960] [2022-11-03 03:37:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:41,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:41,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:41,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:37:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:41,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:41,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:41,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:41,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752173960] [2022-11-03 03:37:41,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752173960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:41,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:41,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:41,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552394912] [2022-11-03 03:37:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:41,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:41,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:41,695 INFO L87 Difference]: Start difference. First operand 592 states and 967 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:41,768 INFO L93 Difference]: Finished difference Result 1166 states and 1912 transitions. [2022-11-03 03:37:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2022-11-03 03:37:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:41,774 INFO L225 Difference]: With dead ends: 1166 [2022-11-03 03:37:41,774 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 03:37:41,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:41,779 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:41,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2844 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 03:37:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-11-03 03:37:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6579520697167756) internal successors, (761), 478 states have internal predecessors, (761), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 966 transitions. [2022-11-03 03:37:41,807 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 966 transitions. Word has length 134 [2022-11-03 03:37:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:41,807 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 966 transitions. [2022-11-03 03:37:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 966 transitions. [2022-11-03 03:37:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:37:41,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:41,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:41,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:42,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash -210562675, now seen corresponding path program 1 times [2022-11-03 03:37:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247678194] [2022-11-03 03:37:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:42,031 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:42,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:37:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:42,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:42,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247678194] [2022-11-03 03:37:42,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247678194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:42,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:42,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:42,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517868898] [2022-11-03 03:37:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:42,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:42,614 INFO L87 Difference]: Start difference. First operand 592 states and 966 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:42,697 INFO L93 Difference]: Finished difference Result 1166 states and 1911 transitions. [2022-11-03 03:37:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2022-11-03 03:37:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:42,703 INFO L225 Difference]: With dead ends: 1166 [2022-11-03 03:37:42,703 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 03:37:42,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:42,707 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 6 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:42,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2844 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:37:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 03:37:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-11-03 03:37:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6557734204793029) internal successors, (760), 478 states have internal predecessors, (760), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 965 transitions. [2022-11-03 03:37:42,731 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 965 transitions. Word has length 135 [2022-11-03 03:37:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:42,731 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 965 transitions. [2022-11-03 03:37:42,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 965 transitions. [2022-11-03 03:37:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:37:42,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:42,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:42,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 03:37:42,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:42,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash 573131045, now seen corresponding path program 1 times [2022-11-03 03:37:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809081685] [2022-11-03 03:37:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:42,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:42,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:37:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:43,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:43,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:43,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809081685] [2022-11-03 03:37:43,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809081685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:43,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:43,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:37:43,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320682134] [2022-11-03 03:37:43,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:43,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:43,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:37:43,574 INFO L87 Difference]: Start difference. First operand 592 states and 965 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:43,806 INFO L93 Difference]: Finished difference Result 1183 states and 1939 transitions. [2022-11-03 03:37:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:37:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2022-11-03 03:37:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:43,818 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 03:37:43,819 INFO L226 Difference]: Without dead ends: 613 [2022-11-03 03:37:43,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:43,824 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 148 mSDsluCounter, 4634 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5583 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:43,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 5583 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-03 03:37:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 611. [2022-11-03 03:37:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 475 states have (on average 1.654736842105263) internal successors, (786), 496 states have internal predecessors, (786), 106 states have call successors, (106), 28 states have call predecessors, (106), 29 states have return successors, (104), 99 states have call predecessors, (104), 101 states have call successors, (104) [2022-11-03 03:37:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 996 transitions. [2022-11-03 03:37:43,861 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 996 transitions. Word has length 136 [2022-11-03 03:37:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:43,862 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 996 transitions. [2022-11-03 03:37:43,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 996 transitions. [2022-11-03 03:37:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:37:43,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:43,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:43,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:44,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:44,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash -67955098, now seen corresponding path program 1 times [2022-11-03 03:37:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197273159] [2022-11-03 03:37:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:44,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:44,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:44,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:37:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:37:44,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:44,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197273159] [2022-11-03 03:37:44,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197273159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:44,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:44,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414797300] [2022-11-03 03:37:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:44,599 INFO L87 Difference]: Start difference. First operand 611 states and 996 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:44,708 INFO L93 Difference]: Finished difference Result 1196 states and 1961 transitions. [2022-11-03 03:37:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:37:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2022-11-03 03:37:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:44,713 INFO L225 Difference]: With dead ends: 1196 [2022-11-03 03:37:44,714 INFO L226 Difference]: Without dead ends: 607 [2022-11-03 03:37:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:44,718 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:44,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2843 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-03 03:37:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-11-03 03:37:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6553911205073997) internal successors, (783), 493 states have internal predecessors, (783), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2022-11-03 03:37:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 989 transitions. [2022-11-03 03:37:44,742 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 989 transitions. Word has length 136 [2022-11-03 03:37:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:44,742 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 989 transitions. [2022-11-03 03:37:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 989 transitions. [2022-11-03 03:37:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 03:37:44,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:44,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:44,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:44,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash 695176180, now seen corresponding path program 1 times [2022-11-03 03:37:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:44,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980609809] [2022-11-03 03:37:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:44,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:44,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:44,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:37:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:45,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:45,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980609809] [2022-11-03 03:37:45,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980609809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:45,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:45,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:45,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544391415] [2022-11-03 03:37:45,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:45,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:45,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:45,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:45,451 INFO L87 Difference]: Start difference. First operand 607 states and 989 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:45,681 INFO L93 Difference]: Finished difference Result 1222 states and 2006 transitions. [2022-11-03 03:37:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2022-11-03 03:37:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:45,688 INFO L225 Difference]: With dead ends: 1222 [2022-11-03 03:37:45,689 INFO L226 Difference]: Without dead ends: 607 [2022-11-03 03:37:45,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:45,692 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 134 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:45,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2651 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-03 03:37:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-11-03 03:37:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6448202959830867) internal successors, (778), 493 states have internal predecessors, (778), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2022-11-03 03:37:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 984 transitions. [2022-11-03 03:37:45,715 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 984 transitions. Word has length 137 [2022-11-03 03:37:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:45,716 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 984 transitions. [2022-11-03 03:37:45,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:45,716 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 984 transitions. [2022-11-03 03:37:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 03:37:45,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:45,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:45,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:45,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -878076950, now seen corresponding path program 1 times [2022-11-03 03:37:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058742418] [2022-11-03 03:37:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:45,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:45,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:45,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:37:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:46,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:46,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058742418] [2022-11-03 03:37:46,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058742418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:46,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:46,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:46,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813170467] [2022-11-03 03:37:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:46,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:46,435 INFO L87 Difference]: Start difference. First operand 607 states and 984 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:46,688 INFO L93 Difference]: Finished difference Result 1222 states and 1996 transitions. [2022-11-03 03:37:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2022-11-03 03:37:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:46,694 INFO L225 Difference]: With dead ends: 1222 [2022-11-03 03:37:46,695 INFO L226 Difference]: Without dead ends: 607 [2022-11-03 03:37:46,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:46,700 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 128 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:46,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2651 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-03 03:37:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-11-03 03:37:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6342494714587739) internal successors, (773), 493 states have internal predecessors, (773), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2022-11-03 03:37:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 979 transitions. [2022-11-03 03:37:46,726 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 979 transitions. Word has length 139 [2022-11-03 03:37:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:46,726 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 979 transitions. [2022-11-03 03:37:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 979 transitions. [2022-11-03 03:37:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:37:46,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:46,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:46,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:46,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:46,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1935952428, now seen corresponding path program 1 times [2022-11-03 03:37:46,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:46,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44849262] [2022-11-03 03:37:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:46,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:46,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:47,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:37:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:47,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:47,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:47,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44849262] [2022-11-03 03:37:47,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44849262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:47,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:47,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:47,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754372995] [2022-11-03 03:37:47,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:47,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:47,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:47,460 INFO L87 Difference]: Start difference. First operand 607 states and 979 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:47,679 INFO L93 Difference]: Finished difference Result 1243 states and 2017 transitions. [2022-11-03 03:37:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:37:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2022-11-03 03:37:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:47,686 INFO L225 Difference]: With dead ends: 1243 [2022-11-03 03:37:47,686 INFO L226 Difference]: Without dead ends: 637 [2022-11-03 03:37:47,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:47,690 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 143 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:47,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2661 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-11-03 03:37:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 622. [2022-11-03 03:37:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 507 states have internal predecessors, (788), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 993 transitions. [2022-11-03 03:37:47,714 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 993 transitions. Word has length 141 [2022-11-03 03:37:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:47,714 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 993 transitions. [2022-11-03 03:37:47,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 993 transitions. [2022-11-03 03:37:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:37:47,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:47,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:47,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:47,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1637201580, now seen corresponding path program 1 times [2022-11-03 03:37:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081399959] [2022-11-03 03:37:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:47,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:47,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:47,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:37:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:48,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:48,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081399959] [2022-11-03 03:37:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081399959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:48,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:48,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:37:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842463721] [2022-11-03 03:37:48,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:37:48,565 INFO L87 Difference]: Start difference. First operand 622 states and 993 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:48,767 INFO L93 Difference]: Finished difference Result 1207 states and 1938 transitions. [2022-11-03 03:37:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:37:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2022-11-03 03:37:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:48,776 INFO L225 Difference]: With dead ends: 1207 [2022-11-03 03:37:48,776 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 03:37:48,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:48,781 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 131 mSDsluCounter, 4599 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5551 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:48,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 5551 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 03:37:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 601. [2022-11-03 03:37:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.60813704496788) internal successors, (751), 486 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 956 transitions. [2022-11-03 03:37:48,813 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 956 transitions. Word has length 141 [2022-11-03 03:37:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:48,813 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 956 transitions. [2022-11-03 03:37:48,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 956 transitions. [2022-11-03 03:37:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:37:48,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:48,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:48,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 03:37:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:49,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash 88504962, now seen corresponding path program 1 times [2022-11-03 03:37:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:49,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479354016] [2022-11-03 03:37:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:49,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:49,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:49,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:37:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:49,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:49,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:49,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:49,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479354016] [2022-11-03 03:37:49,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479354016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:49,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:49,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:49,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227661550] [2022-11-03 03:37:49,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:49,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:49,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:49,556 INFO L87 Difference]: Start difference. First operand 601 states and 956 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:49,707 INFO L93 Difference]: Finished difference Result 1171 states and 1876 transitions. [2022-11-03 03:37:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 142 [2022-11-03 03:37:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:49,713 INFO L225 Difference]: With dead ends: 1171 [2022-11-03 03:37:49,713 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 03:37:49,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:49,716 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 69 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:49,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2675 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 03:37:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-11-03 03:37:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6059957173447537) internal successors, (750), 486 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 955 transitions. [2022-11-03 03:37:49,738 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 955 transitions. Word has length 142 [2022-11-03 03:37:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:49,739 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 955 transitions. [2022-11-03 03:37:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 955 transitions. [2022-11-03 03:37:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 03:37:49,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:49,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:49,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:49,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1279406639, now seen corresponding path program 1 times [2022-11-03 03:37:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:49,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402714594] [2022-11-03 03:37:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:49,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:37:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:37:50,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:50,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:50,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402714594] [2022-11-03 03:37:50,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402714594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:50,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:50,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:37:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043780931] [2022-11-03 03:37:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:50,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:37:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:37:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:37:50,465 INFO L87 Difference]: Start difference. First operand 601 states and 955 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:50,590 INFO L93 Difference]: Finished difference Result 1171 states and 1875 transitions. [2022-11-03 03:37:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:37:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2022-11-03 03:37:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:50,595 INFO L225 Difference]: With dead ends: 1171 [2022-11-03 03:37:50,596 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 03:37:50,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:37:50,599 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 67 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:50,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2675 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 03:37:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2022-11-03 03:37:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6038543897216273) internal successors, (749), 486 states have internal predecessors, (749), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 954 transitions. [2022-11-03 03:37:50,624 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 954 transitions. Word has length 143 [2022-11-03 03:37:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:50,624 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 954 transitions. [2022-11-03 03:37:50,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:37:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 954 transitions. [2022-11-03 03:37:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 03:37:50,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:50,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:50,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:50,855 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1895082307, now seen corresponding path program 1 times [2022-11-03 03:37:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349654051] [2022-11-03 03:37:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:50,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:50,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:50,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:37:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:37:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:51,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:51,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:51,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349654051] [2022-11-03 03:37:51,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349654051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:51,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:51,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392204331] [2022-11-03 03:37:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:51,401 INFO L87 Difference]: Start difference. First operand 601 states and 954 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:51,714 INFO L93 Difference]: Finished difference Result 1176 states and 1882 transitions. [2022-11-03 03:37:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:37:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2022-11-03 03:37:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:51,721 INFO L225 Difference]: With dead ends: 1176 [2022-11-03 03:37:51,721 INFO L226 Difference]: Without dead ends: 612 [2022-11-03 03:37:51,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:37:51,727 INFO L413 NwaCegarLoop]: 896 mSDtfsCounter, 109 mSDsluCounter, 5308 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6204 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:51,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6204 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-03 03:37:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 603. [2022-11-03 03:37:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 469 states have (on average 1.5991471215351811) internal successors, (750), 488 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2022-11-03 03:37:51,756 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 144 [2022-11-03 03:37:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:51,756 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2022-11-03 03:37:51,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2022-11-03 03:37:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 03:37:51,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:51,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:51,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:51,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:51,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1191672762, now seen corresponding path program 1 times [2022-11-03 03:37:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589372191] [2022-11-03 03:37:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:51,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:51,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:51,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:37:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:37:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:37:52,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:52,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589372191] [2022-11-03 03:37:52,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589372191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:52,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:52,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776759391] [2022-11-03 03:37:52,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:52,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:52,514 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:52,811 INFO L93 Difference]: Finished difference Result 1168 states and 1863 transitions. [2022-11-03 03:37:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:37:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2022-11-03 03:37:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:52,817 INFO L225 Difference]: With dead ends: 1168 [2022-11-03 03:37:52,817 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 03:37:52,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:37:52,820 INFO L413 NwaCegarLoop]: 898 mSDtfsCounter, 77 mSDsluCounter, 5314 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6212 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:52,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6212 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 03:37:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2022-11-03 03:37:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 471 states have (on average 1.59447983014862) internal successors, (751), 490 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 956 transitions. [2022-11-03 03:37:52,846 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 956 transitions. Word has length 145 [2022-11-03 03:37:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:52,846 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 956 transitions. [2022-11-03 03:37:52,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 956 transitions. [2022-11-03 03:37:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 03:37:52,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:52,851 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:37:52,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:53,074 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1921082585, now seen corresponding path program 1 times [2022-11-03 03:37:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842708119] [2022-11-03 03:37:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:53,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:53,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:53,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:37:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:53,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:53,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842708119] [2022-11-03 03:37:53,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842708119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:53,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:53,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:37:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273704904] [2022-11-03 03:37:53,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:37:53,679 INFO L87 Difference]: Start difference. First operand 605 states and 956 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:53,867 INFO L93 Difference]: Finished difference Result 1114 states and 1790 transitions. [2022-11-03 03:37:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:37:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 146 [2022-11-03 03:37:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:53,875 INFO L225 Difference]: With dead ends: 1114 [2022-11-03 03:37:53,876 INFO L226 Difference]: Without dead ends: 598 [2022-11-03 03:37:53,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:53,879 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 55 mSDsluCounter, 4479 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5389 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:53,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 5389 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-03 03:37:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-11-03 03:37:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 464 states have (on average 1.6012931034482758) internal successors, (743), 483 states have internal predecessors, (743), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 948 transitions. [2022-11-03 03:37:53,902 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 948 transitions. Word has length 146 [2022-11-03 03:37:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:53,903 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 948 transitions. [2022-11-03 03:37:53,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 948 transitions. [2022-11-03 03:37:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 03:37:53,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:53,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:53,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:54,123 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1413226512, now seen corresponding path program 1 times [2022-11-03 03:37:54,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:54,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356908514] [2022-11-03 03:37:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:54,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:54,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:37:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:54,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:54,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356908514] [2022-11-03 03:37:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356908514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:54,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:54,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:37:54,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822846592] [2022-11-03 03:37:54,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:54,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:37:54,698 INFO L87 Difference]: Start difference. First operand 598 states and 948 transitions. Second operand has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:54,857 INFO L93 Difference]: Finished difference Result 1119 states and 1804 transitions. [2022-11-03 03:37:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:37:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 147 [2022-11-03 03:37:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:54,864 INFO L225 Difference]: With dead ends: 1119 [2022-11-03 03:37:54,864 INFO L226 Difference]: Without dead ends: 595 [2022-11-03 03:37:54,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:54,867 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 97 mSDsluCounter, 4447 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 5349 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:54,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 5349 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-03 03:37:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2022-11-03 03:37:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 461 states have (on average 1.6008676789587852) internal successors, (738), 480 states have internal predecessors, (738), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 943 transitions. [2022-11-03 03:37:54,892 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 943 transitions. Word has length 147 [2022-11-03 03:37:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:54,892 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 943 transitions. [2022-11-03 03:37:54,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 943 transitions. [2022-11-03 03:37:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 03:37:54,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:54,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:54,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:55,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 152738960, now seen corresponding path program 1 times [2022-11-03 03:37:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:55,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378521511] [2022-11-03 03:37:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:55,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:55,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:37:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:55,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:37:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:55,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:55,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378521511] [2022-11-03 03:37:55,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378521511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:55,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:37:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091810824] [2022-11-03 03:37:55,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:55,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:37:55,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:37:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:37:55,639 INFO L87 Difference]: Start difference. First operand 595 states and 943 transitions. Second operand has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:55,804 INFO L93 Difference]: Finished difference Result 1116 states and 1799 transitions. [2022-11-03 03:37:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:37:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 147 [2022-11-03 03:37:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:55,811 INFO L225 Difference]: With dead ends: 1116 [2022-11-03 03:37:55,811 INFO L226 Difference]: Without dead ends: 587 [2022-11-03 03:37:55,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:55,814 INFO L413 NwaCegarLoop]: 901 mSDtfsCounter, 105 mSDsluCounter, 4438 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5339 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:55,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 5339 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-03 03:37:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-11-03 03:37:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6048565121412803) internal successors, (727), 472 states have internal predecessors, (727), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 932 transitions. [2022-11-03 03:37:55,839 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 932 transitions. Word has length 147 [2022-11-03 03:37:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:55,839 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 932 transitions. [2022-11-03 03:37:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 932 transitions. [2022-11-03 03:37:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 03:37:55,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:55,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:55,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:56,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:56,067 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash 709291115, now seen corresponding path program 1 times [2022-11-03 03:37:56,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:56,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889285644] [2022-11-03 03:37:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:56,070 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:56,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:37:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:37:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:56,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:56,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:56,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889285644] [2022-11-03 03:37:56,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889285644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:56,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:56,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263249216] [2022-11-03 03:37:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:56,626 INFO L87 Difference]: Start difference. First operand 587 states and 932 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:56,849 INFO L93 Difference]: Finished difference Result 1102 states and 1777 transitions. [2022-11-03 03:37:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:37:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 148 [2022-11-03 03:37:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:56,855 INFO L225 Difference]: With dead ends: 1102 [2022-11-03 03:37:56,856 INFO L226 Difference]: Without dead ends: 587 [2022-11-03 03:37:56,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:37:56,859 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 67 mSDsluCounter, 5292 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6189 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:56,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6189 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-03 03:37:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-11-03 03:37:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6026490066225165) internal successors, (726), 472 states have internal predecessors, (726), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 931 transitions. [2022-11-03 03:37:56,886 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 931 transitions. Word has length 148 [2022-11-03 03:37:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:56,887 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 931 transitions. [2022-11-03 03:37:56,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 931 transitions. [2022-11-03 03:37:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 03:37:56,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:56,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:56,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:57,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:57,119 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 82162414, now seen corresponding path program 1 times [2022-11-03 03:37:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396931541] [2022-11-03 03:37:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:57,121 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:57,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:37:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:37:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:57,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:57,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396931541] [2022-11-03 03:37:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396931541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:57,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:57,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:57,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394680622] [2022-11-03 03:37:57,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:57,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:57,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:57,643 INFO L87 Difference]: Start difference. First operand 587 states and 931 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:57,874 INFO L93 Difference]: Finished difference Result 1146 states and 1834 transitions. [2022-11-03 03:37:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:37:57,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 149 [2022-11-03 03:37:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:57,879 INFO L225 Difference]: With dead ends: 1146 [2022-11-03 03:37:57,879 INFO L226 Difference]: Without dead ends: 584 [2022-11-03 03:37:57,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:37:57,882 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 101 mSDsluCounter, 5249 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6134 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:57,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6134 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:37:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-03 03:37:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2022-11-03 03:37:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5955555555555556) internal successors, (718), 469 states have internal predecessors, (718), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 923 transitions. [2022-11-03 03:37:57,903 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 923 transitions. Word has length 149 [2022-11-03 03:37:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:57,903 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 923 transitions. [2022-11-03 03:37:57,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 923 transitions. [2022-11-03 03:37:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 03:37:57,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:57,907 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:57,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 03:37:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:58,132 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1497165040, now seen corresponding path program 1 times [2022-11-03 03:37:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16410840] [2022-11-03 03:37:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:58,134 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:58,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:37:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:37:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:58,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:58,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16410840] [2022-11-03 03:37:58,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16410840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:58,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:58,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299915574] [2022-11-03 03:37:58,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:58,654 INFO L87 Difference]: Start difference. First operand 584 states and 923 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:58,878 INFO L93 Difference]: Finished difference Result 1093 states and 1757 transitions. [2022-11-03 03:37:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:37:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 150 [2022-11-03 03:37:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:58,884 INFO L225 Difference]: With dead ends: 1093 [2022-11-03 03:37:58,884 INFO L226 Difference]: Without dead ends: 584 [2022-11-03 03:37:58,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:37:58,888 INFO L413 NwaCegarLoop]: 886 mSDtfsCounter, 50 mSDsluCounter, 5258 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6144 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:58,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6144 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-03 03:37:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2022-11-03 03:37:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5933333333333333) internal successors, (717), 469 states have internal predecessors, (717), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 922 transitions. [2022-11-03 03:37:58,910 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 922 transitions. Word has length 150 [2022-11-03 03:37:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:58,911 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 922 transitions. [2022-11-03 03:37:58,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 922 transitions. [2022-11-03 03:37:58,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:37:58,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:58,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:58,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:59,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:59,130 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -376832801, now seen corresponding path program 1 times [2022-11-03 03:37:59,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536236854] [2022-11-03 03:37:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:59,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:59,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:59,133 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:59,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:37:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:37:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:37:59,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:37:59,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536236854] [2022-11-03 03:37:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536236854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:37:59,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:37:59,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:37:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074453342] [2022-11-03 03:37:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:37:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:37:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:37:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:37:59,664 INFO L87 Difference]: Start difference. First operand 584 states and 922 transitions. Second operand has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:59,902 INFO L93 Difference]: Finished difference Result 1131 states and 1802 transitions. [2022-11-03 03:37:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:37:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2022-11-03 03:37:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:59,908 INFO L225 Difference]: With dead ends: 1131 [2022-11-03 03:37:59,908 INFO L226 Difference]: Without dead ends: 581 [2022-11-03 03:37:59,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:37:59,912 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 69 mSDsluCounter, 5244 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6128 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:59,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 6128 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:37:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-03 03:37:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2022-11-03 03:37:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 447 states have (on average 1.5861297539149888) internal successors, (709), 466 states have internal predecessors, (709), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:37:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 914 transitions. [2022-11-03 03:37:59,935 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 914 transitions. Word has length 151 [2022-11-03 03:37:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:59,935 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 914 transitions. [2022-11-03 03:37:59,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:37:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 914 transitions. [2022-11-03 03:37:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:37:59,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:59,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:37:59,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:00,164 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1757515659, now seen corresponding path program 1 times [2022-11-03 03:38:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:00,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896901761] [2022-11-03 03:38:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:00,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:00,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:00,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:38:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:38:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:38:00,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:00,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896901761] [2022-11-03 03:38:00,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896901761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:00,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:00,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:38:00,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743717809] [2022-11-03 03:38:00,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:00,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:38:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:38:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:00,923 INFO L87 Difference]: Start difference. First operand 581 states and 914 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:02,038 INFO L93 Difference]: Finished difference Result 1086 states and 1769 transitions. [2022-11-03 03:38:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:38:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2022-11-03 03:38:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:02,042 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 03:38:02,043 INFO L226 Difference]: Without dead ends: 585 [2022-11-03 03:38:02,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:38:02,046 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 818 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:02,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 2232 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:38:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-03 03:38:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-03 03:38:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 450 states have (on average 1.5822222222222222) internal successors, (712), 469 states have internal predecessors, (712), 105 states have call successors, (105), 30 states have call predecessors, (105), 29 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2022-11-03 03:38:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 918 transitions. [2022-11-03 03:38:02,076 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 918 transitions. Word has length 152 [2022-11-03 03:38:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:02,077 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 918 transitions. [2022-11-03 03:38:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 918 transitions. [2022-11-03 03:38:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 03:38:02,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:02,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 03:38:02,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:02,303 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1096109369, now seen corresponding path program 1 times [2022-11-03 03:38:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:02,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601326621] [2022-11-03 03:38:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:02,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:02,305 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:02,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:38:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:38:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:38:03,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:03,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601326621] [2022-11-03 03:38:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601326621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:03,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:03,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:38:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339460380] [2022-11-03 03:38:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:38:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:38:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:03,025 INFO L87 Difference]: Start difference. First operand 585 states and 918 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:04,068 INFO L93 Difference]: Finished difference Result 1095 states and 1776 transitions. [2022-11-03 03:38:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:38:04,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2022-11-03 03:38:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:04,074 INFO L225 Difference]: With dead ends: 1095 [2022-11-03 03:38:04,074 INFO L226 Difference]: Without dead ends: 590 [2022-11-03 03:38:04,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:38:04,100 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 818 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:04,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 2233 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:38:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-03 03:38:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-11-03 03:38:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 454 states have (on average 1.577092511013216) internal successors, (716), 473 states have internal predecessors, (716), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (102), 98 states have call predecessors, (102), 100 states have call successors, (102) [2022-11-03 03:38:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 923 transitions. [2022-11-03 03:38:04,138 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 923 transitions. Word has length 154 [2022-11-03 03:38:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 923 transitions. [2022-11-03 03:38:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 923 transitions. [2022-11-03 03:38:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 03:38:04,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:04,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:04,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:04,367 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash 420950325, now seen corresponding path program 1 times [2022-11-03 03:38:04,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534826865] [2022-11-03 03:38:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:04,369 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:04,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:38:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:38:04,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:38:04,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:04,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534826865] [2022-11-03 03:38:04,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534826865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:04,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:04,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:38:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948858281] [2022-11-03 03:38:04,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:38:04,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:38:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:04,990 INFO L87 Difference]: Start difference. First operand 590 states and 923 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:05,997 INFO L93 Difference]: Finished difference Result 1106 states and 1785 transitions. [2022-11-03 03:38:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:38:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 156 [2022-11-03 03:38:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:06,002 INFO L225 Difference]: With dead ends: 1106 [2022-11-03 03:38:06,003 INFO L226 Difference]: Without dead ends: 596 [2022-11-03 03:38:06,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:38:06,005 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 828 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:06,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 2233 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:38:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-03 03:38:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-11-03 03:38:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 459 states have (on average 1.5708061002178648) internal successors, (721), 478 states have internal predecessors, (721), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 98 states have call predecessors, (103), 100 states have call successors, (103) [2022-11-03 03:38:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 929 transitions. [2022-11-03 03:38:06,032 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 929 transitions. Word has length 156 [2022-11-03 03:38:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:06,032 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 929 transitions. [2022-11-03 03:38:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 929 transitions. [2022-11-03 03:38:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 03:38:06,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:06,036 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:06,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:06,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:06,250 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:06,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:06,251 INFO L85 PathProgramCache]: Analyzing trace with hash 469638257, now seen corresponding path program 1 times [2022-11-03 03:38:06,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:06,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239840563] [2022-11-03 03:38:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:06,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:06,253 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:38:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:38:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:38:06,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:06,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239840563] [2022-11-03 03:38:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239840563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:06,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:38:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989905104] [2022-11-03 03:38:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:38:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:38:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:06,893 INFO L87 Difference]: Start difference. First operand 596 states and 929 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:07,843 INFO L93 Difference]: Finished difference Result 1119 states and 1796 transitions. [2022-11-03 03:38:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:38:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 158 [2022-11-03 03:38:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:07,848 INFO L225 Difference]: With dead ends: 1119 [2022-11-03 03:38:07,848 INFO L226 Difference]: Without dead ends: 603 [2022-11-03 03:38:07,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:38:07,852 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 820 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:07,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 2233 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:38:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-03 03:38:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2022-11-03 03:38:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 465 states have (on average 1.5634408602150538) internal successors, (727), 484 states have internal predecessors, (727), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2022-11-03 03:38:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 936 transitions. [2022-11-03 03:38:07,878 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 936 transitions. Word has length 158 [2022-11-03 03:38:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:07,879 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 936 transitions. [2022-11-03 03:38:07,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:38:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 936 transitions. [2022-11-03 03:38:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:38:07,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:07,882 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:07,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:08,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:08,100 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash -201027595, now seen corresponding path program 1 times [2022-11-03 03:38:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533639074] [2022-11-03 03:38:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:08,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:08,103 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:08,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:38:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:38:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:09,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:38:10,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533639074] [2022-11-03 03:38:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533639074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450248949] [2022-11-03 03:38:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:10,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:10,270 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 03:38:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:38:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:38:10,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:10,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450248949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:10,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:38:10,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 10] total 20 [2022-11-03 03:38:10,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662950368] [2022-11-03 03:38:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:10,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:38:10,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:38:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:38:10,999 INFO L87 Difference]: Start difference. First operand 603 states and 936 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:38:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:11,738 INFO L93 Difference]: Finished difference Result 1122 states and 1779 transitions. [2022-11-03 03:38:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:38:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 160 [2022-11-03 03:38:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:11,744 INFO L225 Difference]: With dead ends: 1122 [2022-11-03 03:38:11,744 INFO L226 Difference]: Without dead ends: 599 [2022-11-03 03:38:11,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:38:11,747 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 1311 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:11,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 806 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:38:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-03 03:38:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2022-11-03 03:38:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 463 states have (on average 1.5593952483801297) internal successors, (722), 481 states have internal predecessors, (722), 103 states have call successors, (103), 33 states have call predecessors, (103), 32 states have return successors, (103), 97 states have call predecessors, (103), 99 states have call successors, (103) [2022-11-03 03:38:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2022-11-03 03:38:11,792 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 160 [2022-11-03 03:38:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:11,793 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2022-11-03 03:38:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:38:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2022-11-03 03:38:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 03:38:11,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:11,797 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:11,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:12,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 03:38:12,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:12,201 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1937043287, now seen corresponding path program 1 times [2022-11-03 03:38:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92293430] [2022-11-03 03:38:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:12,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:12,204 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:12,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:38:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:38:12,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:13,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:38:14,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92293430] [2022-11-03 03:38:14,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92293430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:14,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391041601] [2022-11-03 03:38:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:14,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:14,219 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:14,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:38:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:38:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:15,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:38:15,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1391041601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252333023] [2022-11-03 03:38:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:15,998 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:16,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:38:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:38:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:16,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:38:17,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252333023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:17,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:38:17,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2022-11-03 03:38:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800964736] [2022-11-03 03:38:17,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:17,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:38:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:38:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:38:17,586 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2022-11-03 03:38:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:29,400 INFO L93 Difference]: Finished difference Result 1902 states and 3071 transitions. [2022-11-03 03:38:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:38:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 161 [2022-11-03 03:38:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:29,410 INFO L225 Difference]: With dead ends: 1902 [2022-11-03 03:38:29,410 INFO L226 Difference]: Without dead ends: 1383 [2022-11-03 03:38:29,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:38:29,414 INFO L413 NwaCegarLoop]: 1753 mSDtfsCounter, 2957 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 10152 mSolverCounterSat, 1124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3040 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 11276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1124 IncrementalHoareTripleChecker+Valid, 10152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:29,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3040 Valid, 6856 Invalid, 11276 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1124 Valid, 10152 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-03 03:38:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-03 03:38:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1233. [2022-11-03 03:38:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 932 states have (on average 1.5804721030042919) internal successors, (1473), 971 states have internal predecessors, (1473), 235 states have call successors, (235), 59 states have call predecessors, (235), 65 states have return successors, (258), 233 states have call predecessors, (258), 231 states have call successors, (258) [2022-11-03 03:38:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1966 transitions. [2022-11-03 03:38:29,550 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1966 transitions. Word has length 161 [2022-11-03 03:38:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:29,550 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1966 transitions. [2022-11-03 03:38:29,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2022-11-03 03:38:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1966 transitions. [2022-11-03 03:38:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 03:38:29,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:29,553 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:29,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:29,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:29,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 03:38:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:30,157 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1402624228, now seen corresponding path program 1 times [2022-11-03 03:38:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:30,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55348245] [2022-11-03 03:38:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:30,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:30,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:30,159 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:30,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:38:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:38:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:30,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:30,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55348245] [2022-11-03 03:38:30,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55348245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:30,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:30,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:38:30,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829763474] [2022-11-03 03:38:30,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:30,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:38:30,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:38:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:38:30,670 INFO L87 Difference]: Start difference. First operand 1233 states and 1966 transitions. Second operand has 8 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:38:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:30,930 INFO L93 Difference]: Finished difference Result 1755 states and 2805 transitions. [2022-11-03 03:38:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:38:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 163 [2022-11-03 03:38:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:30,937 INFO L225 Difference]: With dead ends: 1755 [2022-11-03 03:38:30,937 INFO L226 Difference]: Without dead ends: 592 [2022-11-03 03:38:30,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:38:30,943 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 69 mSDsluCounter, 5142 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6009 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:30,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 6009 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:38:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-03 03:38:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-11-03 03:38:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 458 states have (on average 1.554585152838428) internal successors, (712), 476 states have internal predecessors, (712), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2022-11-03 03:38:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 914 transitions. [2022-11-03 03:38:30,986 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 914 transitions. Word has length 163 [2022-11-03 03:38:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:30,987 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 914 transitions. [2022-11-03 03:38:30,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:38:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 914 transitions. [2022-11-03 03:38:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 03:38:30,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:30,990 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:31,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:38:31,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:31,206 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1334925208, now seen corresponding path program 1 times [2022-11-03 03:38:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703359891] [2022-11-03 03:38:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:31,213 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:31,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:38:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:38:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:38:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:38:32,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703359891] [2022-11-03 03:38:32,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703359891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938683867] [2022-11-03 03:38:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:32,980 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:32,981 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:32,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 03:38:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:38:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:38:33,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:38:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938683867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:34,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636956795] [2022-11-03 03:38:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:34,456 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 03:38:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:38:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:38:35,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:38:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636956795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:35,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:38:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2022-11-03 03:38:35,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339181421] [2022-11-03 03:38:35,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:35,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:38:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:38:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:38:35,739 INFO L87 Difference]: Start difference. First operand 592 states and 914 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2022-11-03 03:38:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:38,785 INFO L93 Difference]: Finished difference Result 1113 states and 1759 transitions. [2022-11-03 03:38:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:38:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) Word has length 169 [2022-11-03 03:38:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:38,789 INFO L225 Difference]: With dead ends: 1113 [2022-11-03 03:38:38,789 INFO L226 Difference]: Without dead ends: 599 [2022-11-03 03:38:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:38:38,792 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 1329 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:38,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 2284 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:38:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-03 03:38:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2022-11-03 03:38:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 461 states have (on average 1.5509761388286334) internal successors, (715), 479 states have internal predecessors, (715), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (106), 96 states have call predecessors, (106), 97 states have call successors, (106) [2022-11-03 03:38:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 922 transitions. [2022-11-03 03:38:38,841 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 922 transitions. Word has length 169 [2022-11-03 03:38:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 922 transitions. [2022-11-03 03:38:38,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2022-11-03 03:38:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 922 transitions. [2022-11-03 03:38:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 03:38:38,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:38,845 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:38,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:39,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 03:38:39,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 03:38:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:39,449 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash 481778359, now seen corresponding path program 1 times [2022-11-03 03:38:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629600400] [2022-11-03 03:38:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:39,451 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:39,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:38:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:38:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:40,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:40,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:40,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629600400] [2022-11-03 03:38:40,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629600400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:40,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1909903195] [2022-11-03 03:38:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:40,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:40,576 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:40,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:38:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:38:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1909903195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178328912] [2022-11-03 03:38:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:41,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:41,640 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:41,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 03:38:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:38:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:38:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178328912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:42,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:38:42,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 03:38:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021225543] [2022-11-03 03:38:42,708 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:38:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:38:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:38:42,710 INFO L87 Difference]: Start difference. First operand 596 states and 922 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-03 03:38:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:48,476 INFO L93 Difference]: Finished difference Result 2143 states and 3445 transitions. [2022-11-03 03:38:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:38:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) Word has length 170 [2022-11-03 03:38:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:48,487 INFO L225 Difference]: With dead ends: 2143 [2022-11-03 03:38:48,487 INFO L226 Difference]: Without dead ends: 1625 [2022-11-03 03:38:48,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:38:48,490 INFO L413 NwaCegarLoop]: 1401 mSDtfsCounter, 6363 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 3752 mSolverCounterSat, 1979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6452 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1979 IncrementalHoareTripleChecker+Valid, 3752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:48,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6452 Valid, 2685 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1979 Valid, 3752 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 03:38:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-11-03 03:38:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1567. [2022-11-03 03:38:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1203 states have (on average 1.57190357439734) internal successors, (1891), 1248 states have internal predecessors, (1891), 277 states have call successors, (277), 86 states have call predecessors, (277), 86 states have return successors, (312), 269 states have call predecessors, (312), 273 states have call successors, (312) [2022-11-03 03:38:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2480 transitions. [2022-11-03 03:38:48,659 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2480 transitions. Word has length 170 [2022-11-03 03:38:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:48,660 INFO L495 AbstractCegarLoop]: Abstraction has 1567 states and 2480 transitions. [2022-11-03 03:38:48,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-03 03:38:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2480 transitions. [2022-11-03 03:38:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 03:38:48,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:48,663 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:48,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:48,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 03:38:49,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 03:38:49,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:49,266 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 632402719, now seen corresponding path program 1 times [2022-11-03 03:38:49,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282501275] [2022-11-03 03:38:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:49,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:49,268 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:49,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:38:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:38:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:38:51,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:38:51,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:51,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282501275] [2022-11-03 03:38:51,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282501275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:51,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:51,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:38:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938939540] [2022-11-03 03:38:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:38:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:38:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:38:51,945 INFO L87 Difference]: Start difference. First operand 1567 states and 2480 transitions. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 7 states have internal predecessors, (117), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:38:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:58,858 INFO L93 Difference]: Finished difference Result 6290 states and 10183 transitions. [2022-11-03 03:38:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:38:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 7 states have internal predecessors, (117), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 172 [2022-11-03 03:38:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:58,884 INFO L225 Difference]: With dead ends: 6290 [2022-11-03 03:38:58,885 INFO L226 Difference]: Without dead ends: 4801 [2022-11-03 03:38:58,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:38:58,892 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 4094 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 4437 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4271 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 5366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 4437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:58,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4271 Valid, 2974 Invalid, 5366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 4437 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 03:38:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2022-11-03 03:38:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4298. [2022-11-03 03:38:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 3356 states have (on average 1.596543504171633) internal successors, (5358), 3449 states have internal predecessors, (5358), 720 states have call successors, (720), 218 states have call predecessors, (720), 221 states have return successors, (835), 666 states have call predecessors, (835), 716 states have call successors, (835) [2022-11-03 03:38:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 6913 transitions. [2022-11-03 03:38:59,502 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 6913 transitions. Word has length 172 [2022-11-03 03:38:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:59,503 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 6913 transitions. [2022-11-03 03:38:59,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 7 states have internal predecessors, (117), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:38:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 6913 transitions. [2022-11-03 03:38:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 03:38:59,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:59,508 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:59,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 03:38:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:38:59,731 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash 712897035, now seen corresponding path program 1 times [2022-11-03 03:38:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910225314] [2022-11-03 03:38:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:59,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:59,738 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:59,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:39:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:39:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:39:00,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:00,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:00,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910225314] [2022-11-03 03:39:00,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910225314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:00,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:00,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:39:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397022086] [2022-11-03 03:39:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:00,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:39:00,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:39:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:39:00,663 INFO L87 Difference]: Start difference. First operand 4298 states and 6913 transitions. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:39:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:08,720 INFO L93 Difference]: Finished difference Result 12117 states and 19821 transitions. [2022-11-03 03:39:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:39:08,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 176 [2022-11-03 03:39:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:08,783 INFO L225 Difference]: With dead ends: 12117 [2022-11-03 03:39:08,784 INFO L226 Difference]: Without dead ends: 7897 [2022-11-03 03:39:08,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:39:08,839 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 2078 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 6685 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 7205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 6685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:08,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2192 Valid, 3663 Invalid, 7205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 6685 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-03 03:39:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2022-11-03 03:39:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 7650. [2022-11-03 03:39:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7650 states, 5911 states have (on average 1.5856877008966335) internal successors, (9373), 6097 states have internal predecessors, (9373), 1346 states have call successors, (1346), 362 states have call predecessors, (1346), 392 states have return successors, (1642), 1276 states have call predecessors, (1642), 1342 states have call successors, (1642) [2022-11-03 03:39:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 12361 transitions. [2022-11-03 03:39:10,020 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 12361 transitions. Word has length 176 [2022-11-03 03:39:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:10,021 INFO L495 AbstractCegarLoop]: Abstraction has 7650 states and 12361 transitions. [2022-11-03 03:39:10,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 8 states have internal predecessors, (121), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:39:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 12361 transitions. [2022-11-03 03:39:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 03:39:10,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:10,024 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:10,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:10,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:10,247 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -503256691, now seen corresponding path program 1 times [2022-11-03 03:39:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933844764] [2022-11-03 03:39:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:10,250 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:39:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:39:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:39:11,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:11,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933844764] [2022-11-03 03:39:11,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933844764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:11,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:11,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 03:39:11,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844541864] [2022-11-03 03:39:11,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:11,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:39:11,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:39:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:39:11,164 INFO L87 Difference]: Start difference. First operand 7650 states and 12361 transitions. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:39:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:15,561 INFO L93 Difference]: Finished difference Result 13494 states and 21798 transitions. [2022-11-03 03:39:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:39:15,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) Word has length 176 [2022-11-03 03:39:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:15,604 INFO L225 Difference]: With dead ends: 13494 [2022-11-03 03:39:15,604 INFO L226 Difference]: Without dead ends: 7620 [2022-11-03 03:39:15,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:39:15,628 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 1315 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 4129 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 4129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:15,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 2855 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 4129 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 03:39:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2022-11-03 03:39:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7620. [2022-11-03 03:39:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 5896 states have (on average 1.5846336499321574) internal successors, (9343), 6082 states have internal predecessors, (9343), 1331 states have call successors, (1331), 362 states have call predecessors, (1331), 392 states have return successors, (1627), 1261 states have call predecessors, (1627), 1327 states have call successors, (1627) [2022-11-03 03:39:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 12301 transitions. [2022-11-03 03:39:16,378 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 12301 transitions. Word has length 176 [2022-11-03 03:39:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:16,379 INFO L495 AbstractCegarLoop]: Abstraction has 7620 states and 12301 transitions. [2022-11-03 03:39:16,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:39:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 12301 transitions. [2022-11-03 03:39:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 03:39:16,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:16,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:16,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:16,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:16,606 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1298898818, now seen corresponding path program 1 times [2022-11-03 03:39:16,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:16,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650536580] [2022-11-03 03:39:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:16,608 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:39:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:39:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:39:17,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:17,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650536580] [2022-11-03 03:39:17,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650536580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:17,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:17,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:39:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524019524] [2022-11-03 03:39:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:17,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:39:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:39:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:17,474 INFO L87 Difference]: Start difference. First operand 7620 states and 12301 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 03:39:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:22,570 INFO L93 Difference]: Finished difference Result 23004 states and 38016 transitions. [2022-11-03 03:39:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:39:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 183 [2022-11-03 03:39:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:22,669 INFO L225 Difference]: With dead ends: 23004 [2022-11-03 03:39:22,669 INFO L226 Difference]: Without dead ends: 15465 [2022-11-03 03:39:22,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:39:22,710 INFO L413 NwaCegarLoop]: 1564 mSDtfsCounter, 2571 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:22,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 2264 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 03:39:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15465 states. [2022-11-03 03:39:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15465 to 15161. [2022-11-03 03:39:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 11585 states have (on average 1.5770392749244713) internal successors, (18270), 12002 states have internal predecessors, (18270), 2829 states have call successors, (2829), 650 states have call predecessors, (2829), 746 states have return successors, (3737), 2721 states have call predecessors, (3737), 2825 states have call successors, (3737) [2022-11-03 03:39:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 24836 transitions. [2022-11-03 03:39:24,746 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 24836 transitions. Word has length 183 [2022-11-03 03:39:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:24,747 INFO L495 AbstractCegarLoop]: Abstraction has 15161 states and 24836 transitions. [2022-11-03 03:39:24,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 03:39:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 24836 transitions. [2022-11-03 03:39:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-03 03:39:24,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:24,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:24,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 03:39:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:24,950 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1253306110, now seen corresponding path program 1 times [2022-11-03 03:39:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870819251] [2022-11-03 03:39:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:24,952 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:24,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:39:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:39:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:39:25,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:25,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870819251] [2022-11-03 03:39:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870819251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:25,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:25,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:39:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359369078] [2022-11-03 03:39:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:39:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:25,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:39:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:25,680 INFO L87 Difference]: Start difference. First operand 15161 states and 24836 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 03:39:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:33,826 INFO L93 Difference]: Finished difference Result 48454 states and 81983 transitions. [2022-11-03 03:39:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:39:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 184 [2022-11-03 03:39:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:34,095 INFO L225 Difference]: With dead ends: 48454 [2022-11-03 03:39:34,096 INFO L226 Difference]: Without dead ends: 33376 [2022-11-03 03:39:34,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:39:34,185 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 2061 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:34,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 2472 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:39:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33376 states. [2022-11-03 03:39:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33376 to 32856. [2022-11-03 03:39:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32856 states, 24775 states have (on average 1.570776992936428) internal successors, (38916), 25780 states have internal predecessors, (38916), 6557 states have call successors, (6557), 1226 states have call predecessors, (6557), 1523 states have return successors, (9704), 6391 states have call predecessors, (9704), 6553 states have call successors, (9704) [2022-11-03 03:39:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32856 states to 32856 states and 55177 transitions. [2022-11-03 03:39:39,164 INFO L78 Accepts]: Start accepts. Automaton has 32856 states and 55177 transitions. Word has length 184 [2022-11-03 03:39:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:39,165 INFO L495 AbstractCegarLoop]: Abstraction has 32856 states and 55177 transitions. [2022-11-03 03:39:39,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 03:39:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32856 states and 55177 transitions. [2022-11-03 03:39:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-03 03:39:39,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:39,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:39,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 03:39:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:39:39,382 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:39,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1104694855, now seen corresponding path program 1 times [2022-11-03 03:39:39,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:39,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639644321] [2022-11-03 03:39:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:39,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:39,385 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ac9a0a2-6227-4edc-8fdb-ab2d792ec0c7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:39:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:39:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:39:40,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:39:40,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:39:40,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639644321] [2022-11-03 03:39:40,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639644321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:40,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:40,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:39:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323679053] [2022-11-03 03:39:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:39:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:39:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:40,106 INFO L87 Difference]: Start difference. First operand 32856 states and 55177 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 03:39:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:54,254 INFO L93 Difference]: Finished difference Result 109788 states and 193161 transitions. [2022-11-03 03:39:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:39:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 6 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 185 [2022-11-03 03:39:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:55,104 INFO L225 Difference]: With dead ends: 109788 [2022-11-03 03:39:55,104 INFO L226 Difference]: Without dead ends: 77019 [2022-11-03 03:39:55,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:39:55,306 INFO L413 NwaCegarLoop]: 1580 mSDtfsCounter, 3140 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3255 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:55,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3255 Valid, 2201 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 03:39:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77019 states.