./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba --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 e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- 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-b5237d8 [2022-11-22 01:38:39,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:38:39,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:38:39,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:38:39,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:38:39,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:38:39,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:38:39,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:38:39,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:38:39,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:38:39,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:38:39,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:38:39,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:38:39,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:38:39,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:38:39,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:38:39,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:38:39,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:38:39,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:38:39,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:38:39,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:38:39,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:38:39,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:38:39,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:38:39,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:38:39,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:38:39,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:38:39,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:38:39,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:38:39,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:38:39,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:38:39,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:38:39,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:38:39,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:38:39,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:38:39,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:38:39,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:38:39,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:38:39,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:38:39,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:38:39,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:38:39,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:38:39,601 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:38:39,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:38:39,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:38:39,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:38:39,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:38:39,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:38:39,618 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:38:39,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:38:39,619 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:38:39,619 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:38:39,620 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:38:39,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:38:39,621 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:38:39,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:38:39,621 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:38:39,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:38:39,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:38:39,622 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:38:39,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:38:39,623 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:38:39,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:38:39,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:38:39,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:38:39,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:38:39,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:38:39,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:38:39,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:38:39,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:38:39,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:38:39,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:38:39,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:38:39,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:38:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:39,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:38:39,628 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:38:39,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:38:39,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:38:39,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:38:39,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:38:39,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:38:39,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:38:39,630 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_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2022-11-22 01:38:39,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:38:39,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:38:39,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:38:39,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:38:39,929 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:38:39,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-11-22 01:38:43,226 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:38:43,593 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:38:43,594 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-11-22 01:38:43,619 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/data/ba1ddfcd5/c8102fb824b047f2b7eb226922a95d10/FLAG87a35f79a [2022-11-22 01:38:43,635 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/data/ba1ddfcd5/c8102fb824b047f2b7eb226922a95d10 [2022-11-22 01:38:43,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:38:43,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:38:43,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:43,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:38:43,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:38:43,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:43" (1/1) ... [2022-11-22 01:38:43,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bdb283f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:43, skipping insertion in model container [2022-11-22 01:38:43,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:43" (1/1) ... [2022-11-22 01:38:43,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:38:43,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:38:44,215 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-11-22 01:38:44,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:44,467 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:38:44,579 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-11-22 01:38:44,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:44,653 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:38:44,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44 WrapperNode [2022-11-22 01:38:44,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:44,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:44,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:38:44,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:38:44,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,753 INFO L138 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1134 [2022-11-22 01:38:44,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:44,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:38:44,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:38:44,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:38:44,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:38:44,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:38:44,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:38:44,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:38:44,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (1/1) ... [2022-11-22 01:38:44,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:44,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:38:44,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:38:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:38:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:38:44,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:38:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 01:38:44,946 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 01:38:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:38:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:38:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:38:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:38:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 01:38:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 01:38:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:38:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:38:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:38:44,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:38:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:38:44,950 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:38:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:38:44,950 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:38:44,950 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 01:38:44,951 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 01:38:44,951 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:38:44,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:38:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:38:44,953 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:38:44,954 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:38:44,954 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:38:44,955 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:38:44,955 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:38:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 01:38:44,957 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 01:38:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:38:44,958 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:38:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:38:44,958 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:38:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:38:44,959 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:38:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:38:44,959 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:38:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:38:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:38:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:38:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:38:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:38:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:38:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:38:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:38:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:38:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:38:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:38:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:38:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:38:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-22 01:38:44,963 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-22 01:38:45,223 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:38:45,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:38:46,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:38:47,555 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:38:47,556 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:38:47,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:47 BoogieIcfgContainer [2022-11-22 01:38:47,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:38:47,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:38:47,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:38:47,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:38:47,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:38:43" (1/3) ... [2022-11-22 01:38:47,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b654e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:47, skipping insertion in model container [2022-11-22 01:38:47,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:44" (2/3) ... [2022-11-22 01:38:47,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b654e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:47, skipping insertion in model container [2022-11-22 01:38:47,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:47" (3/3) ... [2022-11-22 01:38:47,588 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2022-11-22 01:38:47,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:38:47,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:38:47,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:38:47,727 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;@1742e5b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:38:47,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:38:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-22 01:38:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:38:47,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:47,763 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] [2022-11-22 01:38:47,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1900930352, now seen corresponding path program 1 times [2022-11-22 01:38:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:47,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109820131] [2022-11-22 01:38:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:48,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:48,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109820131] [2022-11-22 01:38:48,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109820131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:48,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:48,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:38:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009771701] [2022-11-22 01:38:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:48,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:38:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:38:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:38:48,396 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 01:38:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:48,634 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-22 01:38:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:38:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-22 01:38:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:48,659 INFO L225 Difference]: With dead ends: 401 [2022-11-22 01:38:48,659 INFO L226 Difference]: Without dead ends: 379 [2022-11-22 01:38:48,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:38:48,667 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:48,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:38:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-22 01:38:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-22 01:38:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 01:38:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-22 01:38:48,824 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-22 01:38:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:48,826 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-22 01:38:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-22 01:38:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-22 01:38:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:38:48,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:48,841 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] [2022-11-22 01:38:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:38:48,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 941732160, now seen corresponding path program 1 times [2022-11-22 01:38:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:48,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759706995] [2022-11-22 01:38:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:38:49,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:49,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759706995] [2022-11-22 01:38:49,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759706995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:49,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:49,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:38:49,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931281981] [2022-11-22 01:38:49,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:38:49,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:38:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:49,403 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:38:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:52,260 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-22 01:38:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:38:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-22 01:38:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:52,277 INFO L225 Difference]: With dead ends: 1243 [2022-11-22 01:38:52,277 INFO L226 Difference]: Without dead ends: 880 [2022-11-22 01:38:52,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:38:52,293 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1226 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:52,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1112 Invalid, 2082 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [449 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 01:38:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-22 01:38:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-22 01:38:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-11-22 01:38:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-22 01:38:52,443 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-22 01:38:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:52,444 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-22 01:38:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 01:38:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-22 01:38:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:38:52,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:52,458 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:52,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:38:52,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:52,471 INFO L85 PathProgramCache]: Analyzing trace with hash 707766777, now seen corresponding path program 1 times [2022-11-22 01:38:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525235199] [2022-11-22 01:38:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:38:53,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525235199] [2022-11-22 01:38:53,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525235199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:53,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:53,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:38:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615083727] [2022-11-22 01:38:53,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:38:53,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:38:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:38:53,086 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 01:38:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:55,795 INFO L93 Difference]: Finished difference Result 2479 states and 4037 transitions. [2022-11-22 01:38:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:38:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-22 01:38:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:55,810 INFO L225 Difference]: With dead ends: 2479 [2022-11-22 01:38:55,810 INFO L226 Difference]: Without dead ends: 1703 [2022-11-22 01:38:55,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:38:55,817 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1159 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:55,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1663 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:38:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-11-22 01:38:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1616. [2022-11-22 01:38:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1143 states have (on average 1.6071741032370954) internal successors, (1837), 1199 states have internal predecessors, (1837), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-11-22 01:38:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2628 transitions. [2022-11-22 01:38:55,982 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2628 transitions. Word has length 88 [2022-11-22 01:38:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:55,983 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2628 transitions. [2022-11-22 01:38:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-22 01:38:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2628 transitions. [2022-11-22 01:38:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:38:55,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:55,987 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:38:55,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 951706947, now seen corresponding path program 1 times [2022-11-22 01:38:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:55,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9068137] [2022-11-22 01:38:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:38:56,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:56,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9068137] [2022-11-22 01:38:56,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9068137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:56,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:56,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:38:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382648354] [2022-11-22 01:38:56,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:56,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:38:56,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:38:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:56,322 INFO L87 Difference]: Start difference. First operand 1616 states and 2628 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:57,222 INFO L93 Difference]: Finished difference Result 1715 states and 2790 transitions. [2022-11-22 01:38:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:38:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-22 01:38:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:57,260 INFO L225 Difference]: With dead ends: 1715 [2022-11-22 01:38:57,260 INFO L226 Difference]: Without dead ends: 1700 [2022-11-22 01:38:57,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:38:57,276 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 690 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:57,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1848 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:38:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-11-22 01:38:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1622. [2022-11-22 01:38:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1149 states have (on average 1.6040034812880766) internal successors, (1843), 1205 states have internal predecessors, (1843), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-11-22 01:38:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2634 transitions. [2022-11-22 01:38:57,482 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2634 transitions. Word has length 92 [2022-11-22 01:38:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:57,482 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2634 transitions. [2022-11-22 01:38:57,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 01:38:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2634 transitions. [2022-11-22 01:38:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 01:38:57,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:57,489 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:38:57,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 827203565, now seen corresponding path program 1 times [2022-11-22 01:38:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:57,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228539627] [2022-11-22 01:38:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:38:58,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228539627] [2022-11-22 01:38:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228539627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:58,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:58,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 01:38:58,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495256252] [2022-11-22 01:38:58,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:58,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:38:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:38:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:38:58,044 INFO L87 Difference]: Start difference. First operand 1622 states and 2634 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:39:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:01,904 INFO L93 Difference]: Finished difference Result 4103 states and 6645 transitions. [2022-11-22 01:39:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:39:01,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-11-22 01:39:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:01,925 INFO L225 Difference]: With dead ends: 4103 [2022-11-22 01:39:01,925 INFO L226 Difference]: Without dead ends: 2497 [2022-11-22 01:39:01,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:39:01,939 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 998 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 5335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:01,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 2832 Invalid, 5335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [390 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 01:39:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-22 01:39:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2414. [2022-11-22 01:39:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1693 states have (on average 1.5871234494979327) internal successors, (2687), 1771 states have internal predecessors, (2687), 576 states have call successors, (576), 125 states have call predecessors, (576), 144 states have return successors, (621), 550 states have call predecessors, (621), 571 states have call successors, (621) [2022-11-22 01:39:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3884 transitions. [2022-11-22 01:39:02,212 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3884 transitions. Word has length 96 [2022-11-22 01:39:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:02,212 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3884 transitions. [2022-11-22 01:39:02,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:39:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3884 transitions. [2022-11-22 01:39:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:39:02,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:02,216 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:39:02,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1965481963, now seen corresponding path program 1 times [2022-11-22 01:39:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:02,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996872986] [2022-11-22 01:39:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:02,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:39:02,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996872986] [2022-11-22 01:39:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996872986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:02,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:02,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:39:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488485353] [2022-11-22 01:39:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:39:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:39:02,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:02,601 INFO L87 Difference]: Start difference. First operand 2414 states and 3884 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:39:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:03,528 INFO L93 Difference]: Finished difference Result 2559 states and 4089 transitions. [2022-11-22 01:39:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:39:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-22 01:39:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:03,548 INFO L225 Difference]: With dead ends: 2559 [2022-11-22 01:39:03,548 INFO L226 Difference]: Without dead ends: 2544 [2022-11-22 01:39:03,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:39:03,552 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 623 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:03,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 2758 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:39:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-22 01:39:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2490. [2022-11-22 01:39:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1745 states have (on average 1.5787965616045845) internal successors, (2755), 1823 states have internal predecessors, (2755), 592 states have call successors, (592), 133 states have call predecessors, (592), 152 states have return successors, (647), 566 states have call predecessors, (647), 587 states have call successors, (647) [2022-11-22 01:39:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3994 transitions. [2022-11-22 01:39:03,799 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3994 transitions. Word has length 97 [2022-11-22 01:39:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:03,800 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3994 transitions. [2022-11-22 01:39:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:39:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3994 transitions. [2022-11-22 01:39:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-22 01:39:03,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:03,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:39:03,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1900539976, now seen corresponding path program 1 times [2022-11-22 01:39:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:03,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444260738] [2022-11-22 01:39:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:39:04,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444260738] [2022-11-22 01:39:04,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444260738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:04,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:04,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437553305] [2022-11-22 01:39:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:04,204 INFO L87 Difference]: Start difference. First operand 2490 states and 3994 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:06,053 INFO L93 Difference]: Finished difference Result 6763 states and 11044 transitions. [2022-11-22 01:39:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:06,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-22 01:39:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:06,082 INFO L225 Difference]: With dead ends: 6763 [2022-11-22 01:39:06,082 INFO L226 Difference]: Without dead ends: 4289 [2022-11-22 01:39:06,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:06,099 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1169 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:06,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 733 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:39:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-11-22 01:39:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3926. [2022-11-22 01:39:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 2756 states have (on average 1.5711175616835995) internal successors, (4330), 2886 states have internal predecessors, (4330), 922 states have call successors, (922), 203 states have call predecessors, (922), 247 states have return successors, (1078), 881 states have call predecessors, (1078), 917 states have call successors, (1078) [2022-11-22 01:39:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6330 transitions. [2022-11-22 01:39:06,552 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6330 transitions. Word has length 104 [2022-11-22 01:39:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:06,553 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6330 transitions. [2022-11-22 01:39:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6330 transitions. [2022-11-22 01:39:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-22 01:39:06,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:06,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:39:06,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1212521930, now seen corresponding path program 1 times [2022-11-22 01:39:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:06,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594865351] [2022-11-22 01:39:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:06,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:39:06,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594865351] [2022-11-22 01:39:06,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594865351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:06,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:06,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88323013] [2022-11-22 01:39:06,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:06,917 INFO L87 Difference]: Start difference. First operand 3926 states and 6330 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:09,242 INFO L93 Difference]: Finished difference Result 11025 states and 18284 transitions. [2022-11-22 01:39:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:09,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-22 01:39:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:09,293 INFO L225 Difference]: With dead ends: 11025 [2022-11-22 01:39:09,294 INFO L226 Difference]: Without dead ends: 7118 [2022-11-22 01:39:09,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:09,320 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1156 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:09,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 742 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:39:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2022-11-22 01:39:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 6647. [2022-11-22 01:39:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6647 states, 4675 states have (on average 1.5670588235294118) internal successors, (7326), 4923 states have internal predecessors, (7326), 1532 states have call successors, (1532), 343 states have call predecessors, (1532), 439 states have return successors, (1994), 1455 states have call predecessors, (1994), 1527 states have call successors, (1994) [2022-11-22 01:39:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6647 states to 6647 states and 10852 transitions. [2022-11-22 01:39:10,125 INFO L78 Accepts]: Start accepts. Automaton has 6647 states and 10852 transitions. Word has length 105 [2022-11-22 01:39:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:10,128 INFO L495 AbstractCegarLoop]: Abstraction has 6647 states and 10852 transitions. [2022-11-22 01:39:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6647 states and 10852 transitions. [2022-11-22 01:39:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 01:39:10,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:10,137 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:39:10,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1066802886, now seen corresponding path program 1 times [2022-11-22 01:39:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933573994] [2022-11-22 01:39:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:10,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:39:10,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:10,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933573994] [2022-11-22 01:39:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933573994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:10,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:10,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440812928] [2022-11-22 01:39:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:10,534 INFO L87 Difference]: Start difference. First operand 6647 states and 10852 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:13,396 INFO L93 Difference]: Finished difference Result 19370 states and 33133 transitions. [2022-11-22 01:39:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-22 01:39:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:13,488 INFO L225 Difference]: With dead ends: 19370 [2022-11-22 01:39:13,488 INFO L226 Difference]: Without dead ends: 12748 [2022-11-22 01:39:13,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:13,539 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1143 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:13,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 751 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:39:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12748 states. [2022-11-22 01:39:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12748 to 12032. [2022-11-22 01:39:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 8462 states have (on average 1.5613330181990073) internal successors, (13212), 8962 states have internal predecessors, (13212), 2730 states have call successors, (2730), 623 states have call predecessors, (2730), 839 states have return successors, (4188), 2581 states have call predecessors, (4188), 2725 states have call successors, (4188) [2022-11-22 01:39:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 20130 transitions. [2022-11-22 01:39:14,958 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 20130 transitions. Word has length 106 [2022-11-22 01:39:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:14,959 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 20130 transitions. [2022-11-22 01:39:14,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 20130 transitions. [2022-11-22 01:39:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 01:39:14,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:14,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:14,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:39:14,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1288575756, now seen corresponding path program 1 times [2022-11-22 01:39:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835199999] [2022-11-22 01:39:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:14,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:39:15,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:15,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835199999] [2022-11-22 01:39:15,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835199999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:15,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:15,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186567222] [2022-11-22 01:39:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:15,253 INFO L87 Difference]: Start difference. First operand 12032 states and 20130 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:19,110 INFO L93 Difference]: Finished difference Result 35899 states and 64844 transitions. [2022-11-22 01:39:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:19,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-22 01:39:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:19,259 INFO L225 Difference]: With dead ends: 35899 [2022-11-22 01:39:19,259 INFO L226 Difference]: Without dead ends: 23904 [2022-11-22 01:39:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:19,326 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1130 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:19,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 763 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:39:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2022-11-22 01:39:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 22669. [2022-11-22 01:39:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22669 states, 15921 states have (on average 1.5542993530557125) internal successors, (24746), 16957 states have internal predecessors, (24746), 5076 states have call successors, (5076), 1183 states have call predecessors, (5076), 1671 states have return successors, (9822), 4783 states have call predecessors, (9822), 5071 states have call successors, (9822) [2022-11-22 01:39:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22669 states to 22669 states and 39644 transitions. [2022-11-22 01:39:22,401 INFO L78 Accepts]: Start accepts. Automaton has 22669 states and 39644 transitions. Word has length 107 [2022-11-22 01:39:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:22,401 INFO L495 AbstractCegarLoop]: Abstraction has 22669 states and 39644 transitions. [2022-11-22 01:39:22,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 22669 states and 39644 transitions. [2022-11-22 01:39:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 01:39:22,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:22,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:39:22,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1290873532, now seen corresponding path program 1 times [2022-11-22 01:39:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069875807] [2022-11-22 01:39:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:39:22,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:22,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069875807] [2022-11-22 01:39:22,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069875807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:22,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:22,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:22,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362270181] [2022-11-22 01:39:22,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:22,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:22,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:22,688 INFO L87 Difference]: Start difference. First operand 22669 states and 39644 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:28,297 INFO L93 Difference]: Finished difference Result 68745 states and 135984 transitions. [2022-11-22 01:39:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-22 01:39:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:28,611 INFO L225 Difference]: With dead ends: 68745 [2022-11-22 01:39:28,611 INFO L226 Difference]: Without dead ends: 46127 [2022-11-22 01:39:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:28,738 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 754 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:39:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46127 states. [2022-11-22 01:39:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46127 to 43534. [2022-11-22 01:39:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43534 states, 30614 states have (on average 1.5510550728424903) internal successors, (47484), 32658 states have internal predecessors, (47484), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-11-22 01:39:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43534 states to 43534 states and 80890 transitions. [2022-11-22 01:39:34,757 INFO L78 Accepts]: Start accepts. Automaton has 43534 states and 80890 transitions. Word has length 108 [2022-11-22 01:39:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:34,758 INFO L495 AbstractCegarLoop]: Abstraction has 43534 states and 80890 transitions. [2022-11-22 01:39:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:39:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 43534 states and 80890 transitions. [2022-11-22 01:39:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-22 01:39:34,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:34,771 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:39:34,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -537917633, now seen corresponding path program 1 times [2022-11-22 01:39:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293503658] [2022-11-22 01:39:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-22 01:39:35,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293503658] [2022-11-22 01:39:35,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293503658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:35,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:35,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:39:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469929316] [2022-11-22 01:39:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:35,037 INFO L87 Difference]: Start difference. First operand 43534 states and 80890 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-22 01:39:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:40,389 INFO L93 Difference]: Finished difference Result 88668 states and 173312 transitions. [2022-11-22 01:39:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:39:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-22 01:39:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:40,874 INFO L225 Difference]: With dead ends: 88668 [2022-11-22 01:39:40,875 INFO L226 Difference]: Without dead ends: 45151 [2022-11-22 01:39:41,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:41,097 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:41,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:39:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45151 states. [2022-11-22 01:39:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45151 to 43732. [2022-11-22 01:39:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43732 states, 30812 states have (on average 1.5475139556017137) internal successors, (47682), 32856 states have internal predecessors, (47682), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-11-22 01:39:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43732 states to 43732 states and 81088 transitions. [2022-11-22 01:39:46,092 INFO L78 Accepts]: Start accepts. Automaton has 43732 states and 81088 transitions. Word has length 156 [2022-11-22 01:39:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:46,092 INFO L495 AbstractCegarLoop]: Abstraction has 43732 states and 81088 transitions. [2022-11-22 01:39:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-22 01:39:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 43732 states and 81088 transitions. [2022-11-22 01:39:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-22 01:39:46,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:46,105 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:39:46,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2099501330, now seen corresponding path program 1 times [2022-11-22 01:39:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886434134] [2022-11-22 01:39:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:39:46,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886434134] [2022-11-22 01:39:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886434134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965215712] [2022-11-22 01:39:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:46,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:46,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:46,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:46,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c614b8f-3ca4-404e-9f31-669ccfbd1a89/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:39:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:39:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 01:39:47,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:47,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965215712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:47,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 01:39:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458096873] [2022-11-22 01:39:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:47,160 INFO L87 Difference]: Start difference. First operand 43732 states and 81088 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27)