./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.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_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/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_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/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_c12f9fad-e4b7-4727-a11c-135b2be2941c/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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- 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 03:56:55,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:55,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:55,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:55,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:55,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:55,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:55,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:55,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:55,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:55,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:55,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:55,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:55,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:55,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:55,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:55,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:55,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:55,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:55,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:55,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:55,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:55,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:55,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:55,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:55,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:55,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:55,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:55,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:55,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:55,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:55,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:55,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:55,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:55,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:55,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:55,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:55,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:55,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:55,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:55,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:55,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:56:55,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:55,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:55,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:55,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:55,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:55,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:55,607 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:55,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:55,608 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:55,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:56:55,609 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:55,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:55,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:56:55,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:56:55,610 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:55,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:56:55,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:56:55,611 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:56:55,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:55,612 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:56:55,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:56:55,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:56:55,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:55,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:55,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:55,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:55,614 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:56:55,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:55,615 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:55,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:55,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:55,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:55,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:55,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:55,617 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:56:55,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:55,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:55,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:56:55,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:56:55,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:55,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:55,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2022-11-03 03:56:55,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:55,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:55,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:55,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:55,954 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:55,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-03 03:56:56,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/data/8f3666c6a/75604757e19d467b821c92f5d4881dd8/FLAGe179c2edc [2022-11-03 03:56:56,654 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:56,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-03 03:56:56,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/data/8f3666c6a/75604757e19d467b821c92f5d4881dd8/FLAGe179c2edc [2022-11-03 03:56:56,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/data/8f3666c6a/75604757e19d467b821c92f5d4881dd8 [2022-11-03 03:56:56,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:56,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:56,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:56,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:56,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:56,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:56" (1/1) ... [2022-11-03 03:56:56,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1430d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:56, skipping insertion in model container [2022-11-03 03:56:56,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:56" (1/1) ... [2022-11-03 03:56:56,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:56,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:57,197 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_c12f9fad-e4b7-4727-a11c-135b2be2941c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-11-03 03:56:57,320 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_c12f9fad-e4b7-4727-a11c-135b2be2941c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-11-03 03:56:57,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:57,474 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:57,489 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_c12f9fad-e4b7-4727-a11c-135b2be2941c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2022-11-03 03:56:57,511 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_c12f9fad-e4b7-4727-a11c-135b2be2941c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2022-11-03 03:56:57,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:57,577 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:57,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57 WrapperNode [2022-11-03 03:56:57,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:57,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:57,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:57,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:57,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,709 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 697 [2022-11-03 03:56:57,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:57,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:57,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:57,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:57,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:57,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:57,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:57,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:57,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (1/1) ... [2022-11-03 03:56:57,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:57,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:57,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:56:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:56:57,889 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:56:57,889 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 03:56:57,890 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 03:56:57,890 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 03:56:57,890 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 03:56:57,890 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 03:56:57,890 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 03:56:57,890 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 03:56:57,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 03:56:57,891 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 03:56:57,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 03:56:57,891 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 03:56:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 03:56:57,893 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 03:56:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 03:56:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 03:56:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 03:56:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 03:56:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 03:56:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 03:56:57,895 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 03:56:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:56:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 03:56:57,896 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 03:56:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 03:56:57,898 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 03:56:57,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:57,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 03:56:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 03:56:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 03:56:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 03:56:58,036 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:58,039 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:59,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:59,551 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:59,551 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-03 03:56:59,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:59 BoogieIcfgContainer [2022-11-03 03:56:59,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:59,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:59,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:59,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:59,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:56" (1/3) ... [2022-11-03 03:56:59,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d84fe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:59, skipping insertion in model container [2022-11-03 03:56:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:57" (2/3) ... [2022-11-03 03:56:59,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d84fe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:59, skipping insertion in model container [2022-11-03 03:56:59,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:59" (3/3) ... [2022-11-03 03:56:59,569 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2022-11-03 03:56:59,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:59,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 03:56:59,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:59,685 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;@a88ba1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:59,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 03:56:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 03:56:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:56:59,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:59,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:59,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2103596867, now seen corresponding path program 1 times [2022-11-03 03:56:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:59,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915791538] [2022-11-03 03:56:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:59,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:00,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:00,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915791538] [2022-11-03 03:57:00,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915791538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:00,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:00,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246148439] [2022-11-03 03:57:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:00,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:57:00,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:57:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:00,298 INFO L87 Difference]: Start difference. First operand has 200 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 154 states have internal predecessors, (223), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:57:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:00,914 INFO L93 Difference]: Finished difference Result 450 states and 661 transitions. [2022-11-03 03:57:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:57:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 03:57:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:00,931 INFO L225 Difference]: With dead ends: 450 [2022-11-03 03:57:00,932 INFO L226 Difference]: Without dead ends: 254 [2022-11-03 03:57:00,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:00,941 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 341 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 492 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:57:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-03 03:57:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2022-11-03 03:57:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 186 states have internal predecessors, (256), 44 states have call successors, (44), 22 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 03:57:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 340 transitions. [2022-11-03 03:57:01,037 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 340 transitions. Word has length 45 [2022-11-03 03:57:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:01,038 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 340 transitions. [2022-11-03 03:57:01,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:57:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 340 transitions. [2022-11-03 03:57:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:57:01,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:01,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:57:01,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1272395806, now seen corresponding path program 1 times [2022-11-03 03:57:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640640591] [2022-11-03 03:57:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:01,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640640591] [2022-11-03 03:57:01,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640640591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:01,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:01,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:57:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821956604] [2022-11-03 03:57:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:01,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:57:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:57:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:57:01,218 INFO L87 Difference]: Start difference. First operand 247 states and 340 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:57:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:02,160 INFO L93 Difference]: Finished difference Result 649 states and 843 transitions. [2022-11-03 03:57:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 03:57:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:02,166 INFO L225 Difference]: With dead ends: 649 [2022-11-03 03:57:02,167 INFO L226 Difference]: Without dead ends: 517 [2022-11-03 03:57:02,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:57:02,170 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 728 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:02,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 919 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:57:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-03 03:57:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 433. [2022-11-03 03:57:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 313 states have (on average 1.329073482428115) internal successors, (416), 319 states have internal predecessors, (416), 71 states have call successors, (71), 45 states have call predecessors, (71), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2022-11-03 03:57:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 558 transitions. [2022-11-03 03:57:02,236 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 558 transitions. Word has length 45 [2022-11-03 03:57:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:02,236 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 558 transitions. [2022-11-03 03:57:02,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:57:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 558 transitions. [2022-11-03 03:57:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:57:02,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:02,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:57:02,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1667510768, now seen corresponding path program 1 times [2022-11-03 03:57:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280087443] [2022-11-03 03:57:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:02,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280087443] [2022-11-03 03:57:02,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280087443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:02,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:02,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:57:02,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674276484] [2022-11-03 03:57:02,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:02,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:57:02,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:57:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:02,576 INFO L87 Difference]: Start difference. First operand 433 states and 558 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 03:57:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:03,486 INFO L93 Difference]: Finished difference Result 949 states and 1174 transitions. [2022-11-03 03:57:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:57:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 03:57:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:03,494 INFO L225 Difference]: With dead ends: 949 [2022-11-03 03:57:03,494 INFO L226 Difference]: Without dead ends: 647 [2022-11-03 03:57:03,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:57:03,509 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 402 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:03,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 780 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:57:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-03 03:57:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 612. [2022-11-03 03:57:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 438 states have (on average 1.2968036529680365) internal successors, (568), 445 states have internal predecessors, (568), 98 states have call successors, (98), 68 states have call predecessors, (98), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2022-11-03 03:57:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 768 transitions. [2022-11-03 03:57:03,616 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 768 transitions. Word has length 46 [2022-11-03 03:57:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:03,617 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 768 transitions. [2022-11-03 03:57:03,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 03:57:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 768 transitions. [2022-11-03 03:57:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:57:03,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:03,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:57:03,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 529718336, now seen corresponding path program 1 times [2022-11-03 03:57:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088459457] [2022-11-03 03:57:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:03,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088459457] [2022-11-03 03:57:03,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088459457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:03,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:03,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:57:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021189069] [2022-11-03 03:57:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:57:03,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:57:03,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:03,766 INFO L87 Difference]: Start difference. First operand 612 states and 768 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:57:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:03,974 INFO L93 Difference]: Finished difference Result 1176 states and 1438 transitions. [2022-11-03 03:57:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:57:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 03:57:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:03,980 INFO L225 Difference]: With dead ends: 1176 [2022-11-03 03:57:03,980 INFO L226 Difference]: Without dead ends: 744 [2022-11-03 03:57:03,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:03,993 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:03,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 454 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-03 03:57:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 639. [2022-11-03 03:57:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 461 states have (on average 1.2863340563991323) internal successors, (593), 468 states have internal predecessors, (593), 100 states have call successors, (100), 70 states have call predecessors, (100), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-03 03:57:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2022-11-03 03:57:04,104 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 47 [2022-11-03 03:57:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:04,107 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2022-11-03 03:57:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:57:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2022-11-03 03:57:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:57:04,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:04,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:57:04,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1325779878, now seen corresponding path program 1 times [2022-11-03 03:57:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618924134] [2022-11-03 03:57:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:04,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618924134] [2022-11-03 03:57:04,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618924134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:04,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:04,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:57:04,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586866278] [2022-11-03 03:57:04,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:04,272 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:57:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:05,220 INFO L93 Difference]: Finished difference Result 1197 states and 1690 transitions. [2022-11-03 03:57:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:57:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-11-03 03:57:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:05,234 INFO L225 Difference]: With dead ends: 1197 [2022-11-03 03:57:05,234 INFO L226 Difference]: Without dead ends: 1077 [2022-11-03 03:57:05,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 03:57:05,237 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 899 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:05,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 952 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:57:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-11-03 03:57:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1064. [2022-11-03 03:57:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 801 states have (on average 1.369538077403246) internal successors, (1097), 811 states have internal predecessors, (1097), 161 states have call successors, (161), 94 states have call predecessors, (161), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2022-11-03 03:57:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1461 transitions. [2022-11-03 03:57:05,409 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1461 transitions. Word has length 50 [2022-11-03 03:57:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:05,410 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1461 transitions. [2022-11-03 03:57:05,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:57:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1461 transitions. [2022-11-03 03:57:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 03:57:05,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:05,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:05,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:57:05,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1062531653, now seen corresponding path program 1 times [2022-11-03 03:57:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:05,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997584170] [2022-11-03 03:57:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:57:05,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997584170] [2022-11-03 03:57:05,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997584170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:05,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:05,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:57:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527210027] [2022-11-03 03:57:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:57:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:57:05,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:05,535 INFO L87 Difference]: Start difference. First operand 1064 states and 1461 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:57:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:05,780 INFO L93 Difference]: Finished difference Result 1254 states and 1682 transitions. [2022-11-03 03:57:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:57:05,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-03 03:57:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:05,788 INFO L225 Difference]: With dead ends: 1254 [2022-11-03 03:57:05,788 INFO L226 Difference]: Without dead ends: 981 [2022-11-03 03:57:05,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:05,793 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 246 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:05,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 305 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-03 03:57:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 872. [2022-11-03 03:57:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 661 states have (on average 1.384266263237519) internal successors, (915), 669 states have internal predecessors, (915), 137 states have call successors, (137), 74 states have call predecessors, (137), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-11-03 03:57:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1223 transitions. [2022-11-03 03:57:05,905 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1223 transitions. Word has length 53 [2022-11-03 03:57:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:05,906 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1223 transitions. [2022-11-03 03:57:05,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:57:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1223 transitions. [2022-11-03 03:57:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:57:05,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:05,908 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:57:05,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1356979246, now seen corresponding path program 1 times [2022-11-03 03:57:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982405783] [2022-11-03 03:57:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:06,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982405783] [2022-11-03 03:57:06,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982405783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:06,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:06,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602495370] [2022-11-03 03:57:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:57:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:57:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:06,035 INFO L87 Difference]: Start difference. First operand 872 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:57:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:06,406 INFO L93 Difference]: Finished difference Result 975 states and 1339 transitions. [2022-11-03 03:57:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:57:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-03 03:57:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:06,415 INFO L225 Difference]: With dead ends: 975 [2022-11-03 03:57:06,415 INFO L226 Difference]: Without dead ends: 972 [2022-11-03 03:57:06,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 03:57:06,417 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 449 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:06,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 281 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:57:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-11-03 03:57:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 871. [2022-11-03 03:57:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 661 states have (on average 1.3797276853252647) internal successors, (912), 668 states have internal predecessors, (912), 136 states have call successors, (136), 74 states have call predecessors, (136), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2022-11-03 03:57:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1219 transitions. [2022-11-03 03:57:06,528 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1219 transitions. Word has length 54 [2022-11-03 03:57:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:06,529 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1219 transitions. [2022-11-03 03:57:06,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:57:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1219 transitions. [2022-11-03 03:57:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:57:06,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:06,536 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:57:06,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash -884337623, now seen corresponding path program 1 times [2022-11-03 03:57:06,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:06,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274486840] [2022-11-03 03:57:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:06,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:06,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274486840] [2022-11-03 03:57:06,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274486840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:06,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388369996] [2022-11-03 03:57:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:06,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:06,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:06,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:57:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:57:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:07,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:07,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388369996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:07,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691234314] [2022-11-03 03:57:07,650 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:57:07,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:07,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:07,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:07,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:13,592 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-03 03:57:13,627 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 141 for LOIs [2022-11-03 03:57:13,656 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-03 03:57:14,285 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-03 03:57:14,370 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-03 03:57:14,451 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-03 03:57:14,486 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-03 03:57:14,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:35,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [691234314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:35,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:35,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-03 03:57:35,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614356618] [2022-11-03 03:57:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:57:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:57:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 03:57:35,477 INFO L87 Difference]: Start difference. First operand 871 states and 1219 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:58:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:06,054 INFO L93 Difference]: Finished difference Result 1235 states and 1630 transitions. [2022-11-03 03:58:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:58:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-03 03:58:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:06,062 INFO L225 Difference]: With dead ends: 1235 [2022-11-03 03:58:06,062 INFO L226 Difference]: Without dead ends: 920 [2022-11-03 03:58:06,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 03:58:06,066 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 207 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:06,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2111 Invalid, 4352 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [215 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 03:58:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-03 03:58:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-11-03 03:58:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 687 states have (on average 1.3682678311499272) internal successors, (940), 694 states have internal predecessors, (940), 138 states have call successors, (138), 80 states have call predecessors, (138), 78 states have return successors, (173), 132 states have call predecessors, (173), 135 states have call successors, (173) [2022-11-03 03:58:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1251 transitions. [2022-11-03 03:58:06,209 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1251 transitions. Word has length 55 [2022-11-03 03:58:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:06,209 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1251 transitions. [2022-11-03 03:58:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:58:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1251 transitions. [2022-11-03 03:58:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:58:06,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:06,212 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:58:06,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:06,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:58:06,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2103277046, now seen corresponding path program 1 times [2022-11-03 03:58:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848090833] [2022-11-03 03:58:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:58:06,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848090833] [2022-11-03 03:58:06,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848090833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:06,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:58:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892693152] [2022-11-03 03:58:06,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:06,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:06,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:06,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:06,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:06,494 INFO L87 Difference]: Start difference. First operand 905 states and 1251 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:06,765 INFO L93 Difference]: Finished difference Result 1186 states and 1573 transitions. [2022-11-03 03:58:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-03 03:58:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:06,775 INFO L225 Difference]: With dead ends: 1186 [2022-11-03 03:58:06,775 INFO L226 Difference]: Without dead ends: 1017 [2022-11-03 03:58:06,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:06,778 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 42 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:06,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 493 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-11-03 03:58:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 940. [2022-11-03 03:58:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 716 states have (on average 1.3631284916201116) internal successors, (976), 723 states have internal predecessors, (976), 141 states have call successors, (141), 83 states have call predecessors, (141), 81 states have return successors, (176), 135 states have call predecessors, (176), 138 states have call successors, (176) [2022-11-03 03:58:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1293 transitions. [2022-11-03 03:58:06,927 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1293 transitions. Word has length 61 [2022-11-03 03:58:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:06,928 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1293 transitions. [2022-11-03 03:58:06,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1293 transitions. [2022-11-03 03:58:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:58:06,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:06,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:06,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:58:06,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:06,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1071658769, now seen corresponding path program 1 times [2022-11-03 03:58:06,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015741590] [2022-11-03 03:58:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:06,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:07,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:07,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015741590] [2022-11-03 03:58:07,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015741590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:07,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:07,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:58:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090334744] [2022-11-03 03:58:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:58:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:58:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:58:07,111 INFO L87 Difference]: Start difference. First operand 940 states and 1293 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:58:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:08,013 INFO L93 Difference]: Finished difference Result 1403 states and 1819 transitions. [2022-11-03 03:58:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:58:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-03 03:58:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:08,020 INFO L225 Difference]: With dead ends: 1403 [2022-11-03 03:58:08,020 INFO L226 Difference]: Without dead ends: 1100 [2022-11-03 03:58:08,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:58:08,022 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 386 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:08,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 848 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:58:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-11-03 03:58:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1079. [2022-11-03 03:58:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 810 states have (on average 1.3320987654320988) internal successors, (1079), 817 states have internal predecessors, (1079), 165 states have call successors, (165), 104 states have call predecessors, (165), 102 states have return successors, (200), 159 states have call predecessors, (200), 162 states have call successors, (200) [2022-11-03 03:58:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1444 transitions. [2022-11-03 03:58:08,188 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1444 transitions. Word has length 63 [2022-11-03 03:58:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:08,188 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1444 transitions. [2022-11-03 03:58:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:58:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1444 transitions. [2022-11-03 03:58:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:58:08,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:08,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:08,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:58:08,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1984887042, now seen corresponding path program 1 times [2022-11-03 03:58:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245447519] [2022-11-03 03:58:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:08,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245447519] [2022-11-03 03:58:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245447519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282040464] [2022-11-03 03:58:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:08,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:08,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:08,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:58:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:58:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:58:08,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:08,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282040464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:08,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366155359] [2022-11-03 03:58:08,975 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:58:08,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:08,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:08,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:08,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:18,582 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-03 03:58:18,616 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2022-11-03 03:58:18,626 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 204 for LOIs [2022-11-03 03:58:18,698 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-03 03:58:19,090 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-03 03:58:19,141 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-03 03:58:19,187 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-03 03:58:19,206 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-03 03:58:19,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:45,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27491#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:45,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:45,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:45,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 03:58:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451021715] [2022-11-03 03:58:45,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:58:45,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:58:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:58:45,635 INFO L87 Difference]: Start difference. First operand 1079 states and 1444 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 03:58:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:46,623 INFO L93 Difference]: Finished difference Result 2173 states and 2685 transitions. [2022-11-03 03:58:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:58:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-03 03:58:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:46,635 INFO L225 Difference]: With dead ends: 2173 [2022-11-03 03:58:46,635 INFO L226 Difference]: Without dead ends: 2170 [2022-11-03 03:58:46,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 03:58:46,637 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 651 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:46,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1023 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:58:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-11-03 03:58:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1593. [2022-11-03 03:58:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1166 states have (on average 1.2847341337907376) internal successors, (1498), 1173 states have internal predecessors, (1498), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-11-03 03:58:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2031 transitions. [2022-11-03 03:58:46,931 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2031 transitions. Word has length 64 [2022-11-03 03:58:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:46,932 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 2031 transitions. [2022-11-03 03:58:46,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 03:58:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2031 transitions. [2022-11-03 03:58:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:58:46,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:46,941 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:58:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:58:47,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash 842595161, now seen corresponding path program 2 times [2022-11-03 03:58:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:47,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748657387] [2022-11-03 03:58:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:47,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:47,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748657387] [2022-11-03 03:58:47,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748657387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:47,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:47,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:58:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916548667] [2022-11-03 03:58:47,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:47,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:47,229 INFO L87 Difference]: Start difference. First operand 1593 states and 2031 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:47,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:47,616 INFO L93 Difference]: Finished difference Result 2345 states and 2887 transitions. [2022-11-03 03:58:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:47,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-03 03:58:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:47,627 INFO L225 Difference]: With dead ends: 2345 [2022-11-03 03:58:47,627 INFO L226 Difference]: Without dead ends: 1589 [2022-11-03 03:58:47,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:47,631 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 249 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:47,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 338 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-03 03:58:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1578. [2022-11-03 03:58:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1151 states have (on average 1.2754126846220677) internal successors, (1468), 1158 states have internal predecessors, (1468), 249 states have call successors, (249), 178 states have call predecessors, (249), 176 states have return successors, (284), 243 states have call predecessors, (284), 246 states have call successors, (284) [2022-11-03 03:58:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2001 transitions. [2022-11-03 03:58:47,953 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2001 transitions. Word has length 67 [2022-11-03 03:58:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:47,954 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2001 transitions. [2022-11-03 03:58:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2001 transitions. [2022-11-03 03:58:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 03:58:47,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:47,958 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:58:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:58:47,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:47,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1234692129, now seen corresponding path program 1 times [2022-11-03 03:58:47,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:47,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141487210] [2022-11-03 03:58:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:47,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:48,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141487210] [2022-11-03 03:58:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141487210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:48,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:48,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:58:48,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778345503] [2022-11-03 03:58:48,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:48,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:48,010 INFO L87 Difference]: Start difference. First operand 1578 states and 2001 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:48,435 INFO L93 Difference]: Finished difference Result 2544 states and 3095 transitions. [2022-11-03 03:58:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:48,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-03 03:58:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:48,445 INFO L225 Difference]: With dead ends: 2544 [2022-11-03 03:58:48,445 INFO L226 Difference]: Without dead ends: 1754 [2022-11-03 03:58:48,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:48,450 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 37 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:48,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 484 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-11-03 03:58:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1625. [2022-11-03 03:58:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1190 states have (on average 1.2722689075630251) internal successors, (1514), 1197 states have internal predecessors, (1514), 253 states have call successors, (253), 182 states have call predecessors, (253), 180 states have return successors, (288), 247 states have call predecessors, (288), 250 states have call successors, (288) [2022-11-03 03:58:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2055 transitions. [2022-11-03 03:58:48,742 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2055 transitions. Word has length 71 [2022-11-03 03:58:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:48,742 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 2055 transitions. [2022-11-03 03:58:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2055 transitions. [2022-11-03 03:58:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:58:48,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:48,746 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:58:48,746 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1343423, now seen corresponding path program 1 times [2022-11-03 03:58:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367832918] [2022-11-03 03:58:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:48,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:58:49,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367832918] [2022-11-03 03:58:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367832918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380444094] [2022-11-03 03:58:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:49,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:49,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:49,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:49,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:58:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:58:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:58:49,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380444094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:49,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:49,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 03:58:49,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525590494] [2022-11-03 03:58:49,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:58:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:58:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:58:49,397 INFO L87 Difference]: Start difference. First operand 1625 states and 2055 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:49,927 INFO L93 Difference]: Finished difference Result 2487 states and 3059 transitions. [2022-11-03 03:58:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:58:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 03:58:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:49,936 INFO L225 Difference]: With dead ends: 2487 [2022-11-03 03:58:49,936 INFO L226 Difference]: Without dead ends: 1440 [2022-11-03 03:58:49,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:58:49,939 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 243 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:49,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1023 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-11-03 03:58:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1255. [2022-11-03 03:58:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 952 states have (on average 1.305672268907563) internal successors, (1243), 959 states have internal predecessors, (1243), 182 states have call successors, (182), 121 states have call predecessors, (182), 119 states have return successors, (217), 176 states have call predecessors, (217), 179 states have call successors, (217) [2022-11-03 03:58:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1642 transitions. [2022-11-03 03:58:50,183 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1642 transitions. Word has length 102 [2022-11-03 03:58:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:50,184 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1642 transitions. [2022-11-03 03:58:50,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1642 transitions. [2022-11-03 03:58:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:58:50,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:50,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:50,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:50,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:50,407 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1238860115, now seen corresponding path program 1 times [2022-11-03 03:58:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864621056] [2022-11-03 03:58:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:58:50,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864621056] [2022-11-03 03:58:50,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864621056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86774582] [2022-11-03 03:58:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:50,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:50,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:58:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:58:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:58:50,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:50,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86774582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:50,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:50,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:58:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785317031] [2022-11-03 03:58:50,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:50,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:50,805 INFO L87 Difference]: Start difference. First operand 1255 states and 1642 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:51,208 INFO L93 Difference]: Finished difference Result 2329 states and 3372 transitions. [2022-11-03 03:58:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2022-11-03 03:58:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:51,219 INFO L225 Difference]: With dead ends: 2329 [2022-11-03 03:58:51,219 INFO L226 Difference]: Without dead ends: 1784 [2022-11-03 03:58:51,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:51,223 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 242 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:51,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-11-03 03:58:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1775. [2022-11-03 03:58:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1370 states have (on average 1.3562043795620438) internal successors, (1858), 1380 states have internal predecessors, (1858), 254 states have call successors, (254), 151 states have call predecessors, (254), 149 states have return successors, (323), 245 states have call predecessors, (323), 251 states have call successors, (323) [2022-11-03 03:58:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2435 transitions. [2022-11-03 03:58:51,510 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2435 transitions. Word has length 95 [2022-11-03 03:58:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:51,510 INFO L495 AbstractCegarLoop]: Abstraction has 1775 states and 2435 transitions. [2022-11-03 03:58:51,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2435 transitions. [2022-11-03 03:58:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:58:51,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:51,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:51,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:58:51,743 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -823113165, now seen corresponding path program 1 times [2022-11-03 03:58:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479552171] [2022-11-03 03:58:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:58:51,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479552171] [2022-11-03 03:58:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479552171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482833658] [2022-11-03 03:58:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:51,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:51,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:51,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:51,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:58:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:52,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:58:52,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:58:52,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:52,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482833658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:52,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:52,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:58:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398089628] [2022-11-03 03:58:52,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:52,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:52,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:52,129 INFO L87 Difference]: Start difference. First operand 1775 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:52,665 INFO L93 Difference]: Finished difference Result 3874 states and 5789 transitions. [2022-11-03 03:58:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2022-11-03 03:58:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:52,682 INFO L225 Difference]: With dead ends: 3874 [2022-11-03 03:58:52,683 INFO L226 Difference]: Without dead ends: 2809 [2022-11-03 03:58:52,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:52,690 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 245 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:52,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-03 03:58:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2795. [2022-11-03 03:58:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2191 states have (on average 1.3957097215883159) internal successors, (3058), 2207 states have internal predecessors, (3058), 393 states have call successors, (393), 211 states have call predecessors, (393), 209 states have return successors, (526), 378 states have call predecessors, (526), 390 states have call successors, (526) [2022-11-03 03:58:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3977 transitions. [2022-11-03 03:58:53,137 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3977 transitions. Word has length 95 [2022-11-03 03:58:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:53,137 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 3977 transitions. [2022-11-03 03:58:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3977 transitions. [2022-11-03 03:58:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:58:53,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:53,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:53,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:53,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:58:53,358 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1848137043, now seen corresponding path program 1 times [2022-11-03 03:58:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:53,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417797034] [2022-11-03 03:58:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:58:53,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417797034] [2022-11-03 03:58:53,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417797034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238317675] [2022-11-03 03:58:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:53,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:53,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:58:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:58:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:58:53,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:53,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238317675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:53,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:53,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:58:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765610959] [2022-11-03 03:58:53,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:53,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:53,755 INFO L87 Difference]: Start difference. First operand 2795 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:54,502 INFO L93 Difference]: Finished difference Result 6904 states and 10482 transitions. [2022-11-03 03:58:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2022-11-03 03:58:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:54,532 INFO L225 Difference]: With dead ends: 6904 [2022-11-03 03:58:54,532 INFO L226 Difference]: Without dead ends: 4819 [2022-11-03 03:58:54,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:54,544 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 236 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:54,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 383 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4819 states. [2022-11-03 03:58:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4819 to 4795. [2022-11-03 03:58:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 3803 states have (on average 1.419405732316592) internal successors, (5398), 3831 states have internal predecessors, (5398), 661 states have call successors, (661), 331 states have call predecessors, (661), 329 states have return successors, (914), 634 states have call predecessors, (914), 658 states have call successors, (914) [2022-11-03 03:58:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 6973 transitions. [2022-11-03 03:58:55,170 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 6973 transitions. Word has length 95 [2022-11-03 03:58:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:55,171 INFO L495 AbstractCegarLoop]: Abstraction has 4795 states and 6973 transitions. [2022-11-03 03:58:55,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:58:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 6973 transitions. [2022-11-03 03:58:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:58:55,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:55,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:55,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:58:55,407 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1002355149, now seen corresponding path program 1 times [2022-11-03 03:58:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:55,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136785630] [2022-11-03 03:58:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:58:55,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136785630] [2022-11-03 03:58:55,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136785630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:55,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:55,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:58:55,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692766902] [2022-11-03 03:58:55,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:55,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:55,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:55,497 INFO L87 Difference]: Start difference. First operand 4795 states and 6973 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:56,407 INFO L93 Difference]: Finished difference Result 9007 states and 13628 transitions. [2022-11-03 03:58:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2022-11-03 03:58:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:56,453 INFO L225 Difference]: With dead ends: 9007 [2022-11-03 03:58:56,453 INFO L226 Difference]: Without dead ends: 5723 [2022-11-03 03:58:56,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:56,469 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 74 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:56,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 535 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2022-11-03 03:58:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 5355. [2022-11-03 03:58:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 4331 states have (on average 1.4550912029554375) internal successors, (6302), 4359 states have internal predecessors, (6302), 677 states have call successors, (677), 347 states have call predecessors, (677), 345 states have return successors, (930), 650 states have call predecessors, (930), 674 states have call successors, (930) [2022-11-03 03:58:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 7909 transitions. [2022-11-03 03:58:57,104 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 7909 transitions. Word has length 95 [2022-11-03 03:58:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:57,105 INFO L495 AbstractCegarLoop]: Abstraction has 5355 states and 7909 transitions. [2022-11-03 03:58:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:58:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 7909 transitions. [2022-11-03 03:58:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:58:57,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:57,117 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:57,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:58:57,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 680247358, now seen corresponding path program 1 times [2022-11-03 03:58:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:57,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327549887] [2022-11-03 03:58:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:57,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:58:57,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327549887] [2022-11-03 03:58:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327549887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157916229] [2022-11-03 03:58:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:57,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:57,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:57,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:58:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:58:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:57,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:57,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157916229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:57,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:57,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 03:58:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294203122] [2022-11-03 03:58:57,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:58:57,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:58:57,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:58:57,602 INFO L87 Difference]: Start difference. First operand 5355 states and 7909 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:58,385 INFO L93 Difference]: Finished difference Result 5904 states and 8534 transitions. [2022-11-03 03:58:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:58:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-03 03:58:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:58,407 INFO L225 Difference]: With dead ends: 5904 [2022-11-03 03:58:58,407 INFO L226 Difference]: Without dead ends: 5311 [2022-11-03 03:58:58,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:58:58,412 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 69 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:58,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1062 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2022-11-03 03:58:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 5219. [2022-11-03 03:58:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5219 states, 4231 states have (on average 1.4618293547624674) internal successors, (6185), 4259 states have internal predecessors, (6185), 658 states have call successors, (658), 330 states have call predecessors, (658), 328 states have return successors, (911), 631 states have call predecessors, (911), 655 states have call successors, (911) [2022-11-03 03:58:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5219 states to 5219 states and 7754 transitions. [2022-11-03 03:58:59,040 INFO L78 Accepts]: Start accepts. Automaton has 5219 states and 7754 transitions. Word has length 112 [2022-11-03 03:58:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:59,041 INFO L495 AbstractCegarLoop]: Abstraction has 5219 states and 7754 transitions. [2022-11-03 03:58:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5219 states and 7754 transitions. [2022-11-03 03:58:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:58:59,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:59,055 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:59,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:59,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:59,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:59,271 INFO L85 PathProgramCache]: Analyzing trace with hash -229557329, now seen corresponding path program 1 times [2022-11-03 03:58:59,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:59,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756183261] [2022-11-03 03:58:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:59,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:58:59,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:59,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756183261] [2022-11-03 03:58:59,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756183261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:59,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179063489] [2022-11-03 03:58:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:59,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:59,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:59,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:58:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:58:59,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:58:59,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179063489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:59,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 03:58:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354758848] [2022-11-03 03:58:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:58:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:58:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:58:59,760 INFO L87 Difference]: Start difference. First operand 5219 states and 7754 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:59:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:00,625 INFO L93 Difference]: Finished difference Result 5968 states and 8599 transitions. [2022-11-03 03:59:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:59:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 03:59:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:00,648 INFO L225 Difference]: With dead ends: 5968 [2022-11-03 03:59:00,649 INFO L226 Difference]: Without dead ends: 5511 [2022-11-03 03:59:00,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:59:00,653 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 229 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:00,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1118 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-11-03 03:59:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5477. [2022-11-03 03:59:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 4393 states have (on average 1.4488959708627362) internal successors, (6365), 4427 states have internal predecessors, (6365), 706 states have call successors, (706), 372 states have call predecessors, (706), 376 states have return successors, (971), 679 states have call predecessors, (971), 703 states have call successors, (971) [2022-11-03 03:59:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 8042 transitions. [2022-11-03 03:59:01,297 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 8042 transitions. Word has length 113 [2022-11-03 03:59:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:01,298 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 8042 transitions. [2022-11-03 03:59:01,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:59:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 8042 transitions. [2022-11-03 03:59:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:59:01,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:01,309 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:01,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:01,523 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -365014135, now seen corresponding path program 1 times [2022-11-03 03:59:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:01,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166074502] [2022-11-03 03:59:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:59:02,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:02,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166074502] [2022-11-03 03:59:02,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166074502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26871300] [2022-11-03 03:59:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:02,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:02,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:02,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:59:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 03:59:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:59:03,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:59:05,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26871300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735379308] [2022-11-03 03:59:05,907 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 03:59:05,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:05,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:05,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:05,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:51,056 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-03 03:59:51,511 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 203 for LOIs [2022-11-03 03:59:51,569 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 98 for LOIs [2022-11-03 03:59:51,580 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-03 03:59:53,500 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-03 03:59:53,770 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 98 for LOIs [2022-11-03 03:59:53,979 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-03 03:59:54,452 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-03 03:59:54,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:03,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137706#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 0 ~t5_i~0) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:01:03,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:03,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:03,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-03 04:01:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415043236] [2022-11-03 04:01:03,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 04:01:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 04:01:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10572, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 04:01:03,609 INFO L87 Difference]: Start difference. First operand 5477 states and 8042 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-03 04:01:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:27,896 INFO L93 Difference]: Finished difference Result 7988 states and 10958 transitions. [2022-11-03 04:01:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-03 04:01:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-03 04:01:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:27,923 INFO L225 Difference]: With dead ends: 7988 [2022-11-03 04:01:27,924 INFO L226 Difference]: Without dead ends: 7273 [2022-11-03 04:01:27,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43797 ImplicationChecksByTransitivity, 87.5s TimeCoverageRelationStatistics Valid=10057, Invalid=99173, Unknown=0, NotChecked=0, Total=109230 [2022-11-03 04:01:27,947 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 4480 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 6963 mSolverCounterSat, 2432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4481 SdHoareTripleChecker+Valid, 3029 SdHoareTripleChecker+Invalid, 9395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2432 IncrementalHoareTripleChecker+Valid, 6963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:27,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4481 Valid, 3029 Invalid, 9395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2432 Valid, 6963 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 04:01:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2022-11-03 04:01:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 5753. [2022-11-03 04:01:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 4577 states have (on average 1.436748962202316) internal successors, (6576), 4613 states have internal predecessors, (6576), 751 states have call successors, (751), 409 states have call predecessors, (751), 423 states have return successors, (1028), 732 states have call predecessors, (1028), 748 states have call successors, (1028) [2022-11-03 04:01:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 8355 transitions. [2022-11-03 04:01:28,923 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 8355 transitions. Word has length 114 [2022-11-03 04:01:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:28,924 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 8355 transitions. [2022-11-03 04:01:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-03 04:01:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 8355 transitions. [2022-11-03 04:01:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 04:01:28,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:28,935 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:01:28,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 04:01:29,151 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 622313394, now seen corresponding path program 1 times [2022-11-03 04:01:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:29,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553860753] [2022-11-03 04:01:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 04:01:29,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553860753] [2022-11-03 04:01:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553860753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326692909] [2022-11-03 04:01:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:29,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:29,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:29,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:01:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:01:29,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:01:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:01:30,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326692909] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:30,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:30,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 04:01:30,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414122373] [2022-11-03 04:01:30,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:30,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:30,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:30,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:01:30,018 INFO L87 Difference]: Start difference. First operand 5753 states and 8355 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:01:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:31,611 INFO L93 Difference]: Finished difference Result 7077 states and 9903 transitions. [2022-11-03 04:01:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:01:31,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-03 04:01:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:31,635 INFO L225 Difference]: With dead ends: 7077 [2022-11-03 04:01:31,635 INFO L226 Difference]: Without dead ends: 6086 [2022-11-03 04:01:31,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-03 04:01:31,641 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 391 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:31,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 662 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:01:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-11-03 04:01:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5833. [2022-11-03 04:01:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 4622 states have (on average 1.4337948939852878) internal successors, (6627), 4661 states have internal predecessors, (6627), 770 states have call successors, (770), 418 states have call predecessors, (770), 439 states have return successors, (1068), 755 states have call predecessors, (1068), 767 states have call successors, (1068) [2022-11-03 04:01:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 8465 transitions. [2022-11-03 04:01:32,415 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 8465 transitions. Word has length 115 [2022-11-03 04:01:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:32,416 INFO L495 AbstractCegarLoop]: Abstraction has 5833 states and 8465 transitions. [2022-11-03 04:01:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:01:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 8465 transitions. [2022-11-03 04:01:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:32,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:32,428 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 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] [2022-11-03 04:01:32,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:32,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1708300311, now seen corresponding path program 1 times [2022-11-03 04:01:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:32,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50660247] [2022-11-03 04:01:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 04:01:33,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:33,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50660247] [2022-11-03 04:01:33,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50660247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132769579] [2022-11-03 04:01:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:33,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 04:01:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:01:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:01:35,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 04:01:37,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132769579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350664290] [2022-11-03 04:01:37,005 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 04:01:37,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:37,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:37,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:37,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:50,933 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-03 04:01:51,717 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 201 for LOIs [2022-11-03 04:01:51,776 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2022-11-03 04:01:51,790 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-03 04:01:53,855 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-03 04:01:54,110 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 100 for LOIs [2022-11-03 04:01:54,330 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-03 04:01:55,016 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-03 04:01:55,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:50,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177963#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:50,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:50,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:50,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-03 04:02:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398766423] [2022-11-03 04:02:50,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:50,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 04:02:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 04:02:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=11482, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 04:02:50,857 INFO L87 Difference]: Start difference. First operand 5833 states and 8465 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-03 04:03:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:10,432 INFO L93 Difference]: Finished difference Result 8117 states and 11167 transitions. [2022-11-03 04:03:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-03 04:03:10,432 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-03 04:03:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:10,455 INFO L225 Difference]: With dead ends: 8117 [2022-11-03 04:03:10,455 INFO L226 Difference]: Without dead ends: 7046 [2022-11-03 04:03:10,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26800 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=6748, Invalid=62158, Unknown=0, NotChecked=0, Total=68906 [2022-11-03 04:03:10,469 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 5834 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 8809 mSolverCounterSat, 3920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5834 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 12729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3920 IncrementalHoareTripleChecker+Valid, 8809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:10,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5834 Valid, 3064 Invalid, 12729 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3920 Valid, 8809 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 04:03:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2022-11-03 04:03:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 5649. [2022-11-03 04:03:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 4510 states have (on average 1.441019955654102) internal successors, (6499), 4548 states have internal predecessors, (6499), 730 states have call successors, (730), 386 states have call predecessors, (730), 407 states have return successors, (1018), 716 states have call predecessors, (1018), 727 states have call successors, (1018) [2022-11-03 04:03:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8247 transitions. [2022-11-03 04:03:11,372 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8247 transitions. Word has length 124 [2022-11-03 04:03:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:11,373 INFO L495 AbstractCegarLoop]: Abstraction has 5649 states and 8247 transitions. [2022-11-03 04:03:11,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-03 04:03:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8247 transitions. [2022-11-03 04:03:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:03:11,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:11,384 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:11,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 04:03:11,599 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1568769134, now seen corresponding path program 1 times [2022-11-03 04:03:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:11,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529673680] [2022-11-03 04:03:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 04:03:11,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529673680] [2022-11-03 04:03:11,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529673680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488876233] [2022-11-03 04:03:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:11,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:11,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 04:03:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:03:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:03:12,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:03:12,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488876233] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:12,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:03:12,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 04:03:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963255403] [2022-11-03 04:03:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:03:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:03:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:03:12,416 INFO L87 Difference]: Start difference. First operand 5649 states and 8247 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:03:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:14,151 INFO L93 Difference]: Finished difference Result 6304 states and 8988 transitions. [2022-11-03 04:03:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:03:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-03 04:03:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:14,175 INFO L225 Difference]: With dead ends: 6304 [2022-11-03 04:03:14,175 INFO L226 Difference]: Without dead ends: 5417 [2022-11-03 04:03:14,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:03:14,182 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 580 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:14,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 524 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:03:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2022-11-03 04:03:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5380. [2022-11-03 04:03:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 4311 states have (on average 1.4507074924611458) internal successors, (6254), 4349 states have internal predecessors, (6254), 694 states have call successors, (694), 356 states have call predecessors, (694), 373 states have return successors, (977), 676 states have call predecessors, (977), 691 states have call successors, (977) [2022-11-03 04:03:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 7925 transitions. [2022-11-03 04:03:15,295 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 7925 transitions. Word has length 125 [2022-11-03 04:03:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:15,295 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 7925 transitions. [2022-11-03 04:03:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:03:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 7925 transitions. [2022-11-03 04:03:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 04:03:15,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:15,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:15,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 04:03:15,527 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 520481304, now seen corresponding path program 1 times [2022-11-03 04:03:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:15,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383992142] [2022-11-03 04:03:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 04:03:15,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383992142] [2022-11-03 04:03:15,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383992142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:15,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:15,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:03:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567972280] [2022-11-03 04:03:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:15,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:03:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:03:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:03:15,614 INFO L87 Difference]: Start difference. First operand 5380 states and 7925 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:03:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:17,186 INFO L93 Difference]: Finished difference Result 14493 states and 22298 transitions. [2022-11-03 04:03:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:03:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-03 04:03:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:17,223 INFO L225 Difference]: With dead ends: 14493 [2022-11-03 04:03:17,223 INFO L226 Difference]: Without dead ends: 9848 [2022-11-03 04:03:17,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:03:17,240 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 238 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:17,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2022-11-03 04:03:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9788. [2022-11-03 04:03:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9788 states, 7931 states have (on average 1.4593367797251293) internal successors, (11574), 7993 states have internal predecessors, (11574), 1226 states have call successors, (1226), 612 states have call predecessors, (1226), 629 states have return successors, (1733), 1184 states have call predecessors, (1733), 1223 states have call successors, (1733) [2022-11-03 04:03:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14533 transitions. [2022-11-03 04:03:18,592 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14533 transitions. Word has length 127 [2022-11-03 04:03:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:18,592 INFO L495 AbstractCegarLoop]: Abstraction has 9788 states and 14533 transitions. [2022-11-03 04:03:18,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:03:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14533 transitions. [2022-11-03 04:03:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 04:03:18,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:18,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 04:03:18,616 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 618094403, now seen corresponding path program 1 times [2022-11-03 04:03:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:18,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432239486] [2022-11-03 04:03:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 04:03:18,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432239486] [2022-11-03 04:03:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432239486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:18,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:18,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:03:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98121831] [2022-11-03 04:03:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:18,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:03:18,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:03:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:03:18,690 INFO L87 Difference]: Start difference. First operand 9788 states and 14533 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:03:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:21,140 INFO L93 Difference]: Finished difference Result 27541 states and 42206 transitions. [2022-11-03 04:03:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:03:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-03 04:03:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:21,203 INFO L225 Difference]: With dead ends: 27541 [2022-11-03 04:03:21,203 INFO L226 Difference]: Without dead ends: 18488 [2022-11-03 04:03:21,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:03:21,244 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 241 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 385 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2022-11-03 04:03:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18372. [2022-11-03 04:03:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18372 states, 14979 states have (on average 1.4573736564523667) internal successors, (21830), 15089 states have internal predecessors, (21830), 2250 states have call successors, (2250), 1124 states have call predecessors, (2250), 1141 states have return successors, (3173), 2160 states have call predecessors, (3173), 2247 states have call successors, (3173) [2022-11-03 04:03:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18372 states to 18372 states and 27253 transitions. [2022-11-03 04:03:23,932 INFO L78 Accepts]: Start accepts. Automaton has 18372 states and 27253 transitions. Word has length 127 [2022-11-03 04:03:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 18372 states and 27253 transitions. [2022-11-03 04:03:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 04:03:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18372 states and 27253 transitions. [2022-11-03 04:03:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 04:03:23,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:23,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:23,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 04:03:23,994 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1737952025, now seen corresponding path program 1 times [2022-11-03 04:03:23,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:23,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590741229] [2022-11-03 04:03:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:03:24,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:24,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590741229] [2022-11-03 04:03:24,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590741229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:24,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986954365] [2022-11-03 04:03:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:24,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:24,319 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:24,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:03:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:03:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 04:03:24,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986954365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:24,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:24,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:03:24,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707050966] [2022-11-03 04:03:24,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:03:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:03:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:24,635 INFO L87 Difference]: Start difference. First operand 18372 states and 27253 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:03:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:27,721 INFO L93 Difference]: Finished difference Result 33473 states and 49724 transitions. [2022-11-03 04:03:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:03:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-03 04:03:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:27,789 INFO L225 Difference]: With dead ends: 33473 [2022-11-03 04:03:27,789 INFO L226 Difference]: Without dead ends: 23053 [2022-11-03 04:03:27,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:27,822 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 247 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:27,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 287 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-11-03 04:03:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 23053. [2022-11-03 04:03:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23053 states, 19185 states have (on average 1.4121449048735992) internal successors, (27092), 19295 states have internal predecessors, (27092), 2407 states have call successors, (2407), 1441 states have call predecessors, (2407), 1459 states have return successors, (3456), 2318 states have call predecessors, (3456), 2404 states have call successors, (3456) [2022-11-03 04:03:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23053 states to 23053 states and 32955 transitions. [2022-11-03 04:03:31,137 INFO L78 Accepts]: Start accepts. Automaton has 23053 states and 32955 transitions. Word has length 146 [2022-11-03 04:03:31,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:31,138 INFO L495 AbstractCegarLoop]: Abstraction has 23053 states and 32955 transitions. [2022-11-03 04:03:31,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:03:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23053 states and 32955 transitions. [2022-11-03 04:03:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 04:03:31,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:31,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 04:03:31,411 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 792198662, now seen corresponding path program 2 times [2022-11-03 04:03:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:31,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610893074] [2022-11-03 04:03:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 04:03:31,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610893074] [2022-11-03 04:03:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610893074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913465288] [2022-11-03 04:03:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:31,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:31,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:31,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 04:03:31,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:03:31,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:03:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:03:31,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:31,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913465288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:31,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:31,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:03:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262162443] [2022-11-03 04:03:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:31,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:03:31,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:03:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:31,898 INFO L87 Difference]: Start difference. First operand 23053 states and 32955 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:03:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:36,523 INFO L93 Difference]: Finished difference Result 45788 states and 67298 transitions. [2022-11-03 04:03:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:03:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-03 04:03:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:36,619 INFO L225 Difference]: With dead ends: 45788 [2022-11-03 04:03:36,619 INFO L226 Difference]: Without dead ends: 32537 [2022-11-03 04:03:36,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:36,666 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 141 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:36,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 578 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32537 states. [2022-11-03 04:03:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32537 to 32053. [2022-11-03 04:03:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32053 states, 26750 states have (on average 1.4098317757009347) internal successors, (37713), 26892 states have internal predecessors, (37713), 3301 states have call successors, (3301), 1983 states have call predecessors, (3301), 2000 states have return successors, (5273), 3179 states have call predecessors, (5273), 3298 states have call successors, (5273) [2022-11-03 04:03:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32053 states to 32053 states and 46287 transitions. [2022-11-03 04:03:41,401 INFO L78 Accepts]: Start accepts. Automaton has 32053 states and 46287 transitions. Word has length 146 [2022-11-03 04:03:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:41,402 INFO L495 AbstractCegarLoop]: Abstraction has 32053 states and 46287 transitions. [2022-11-03 04:03:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:03:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 32053 states and 46287 transitions. [2022-11-03 04:03:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 04:03:41,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:41,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:41,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 04:03:41,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1385464194, now seen corresponding path program 1 times [2022-11-03 04:03:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026915012] [2022-11-03 04:03:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:03:41,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026915012] [2022-11-03 04:03:41,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026915012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470757196] [2022-11-03 04:03:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:41,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:41,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12f9fad-e4b7-4727-a11c-135b2be2941c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 04:03:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:03:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:03:42,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:42,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470757196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:42,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:03:42,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:03:42,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81376434] [2022-11-03 04:03:42,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:03:42,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:03:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:42,113 INFO L87 Difference]: Start difference. First operand 32053 states and 46287 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 04:03:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:48,608 INFO L93 Difference]: Finished difference Result 74501 states and 110139 transitions. [2022-11-03 04:03:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:03:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2022-11-03 04:03:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:48,733 INFO L225 Difference]: With dead ends: 74501 [2022-11-03 04:03:48,733 INFO L226 Difference]: Without dead ends: 43184 [2022-11-03 04:03:48,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:03:48,962 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 83 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:48,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 468 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43184 states.