./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur --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 bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 --- 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-38b53e6 [2022-11-25 23:38:06,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:38:06,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:38:06,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:38:06,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:38:06,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:38:06,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:38:06,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:38:06,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:38:06,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:38:06,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:38:06,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:38:06,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:38:06,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:38:06,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:38:06,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:38:06,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:38:06,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:38:06,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:38:06,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:38:06,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:38:06,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:38:06,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:38:06,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:38:06,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:38:06,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:38:06,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:38:06,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:38:06,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:38:06,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:38:06,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:38:06,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:38:06,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:38:06,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:38:06,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:38:06,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:38:06,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:38:06,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:38:06,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:38:06,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:38:06,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:38:06,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:38:06,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:38:06,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:38:06,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:38:06,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:38:06,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:38:06,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:38:06,747 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:38:06,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:38:06,747 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:38:06,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:38:06,748 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:38:06,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:38:06,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:38:06,749 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:38:06,749 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:38:06,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:38:06,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:38:06,750 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:38:06,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:38:06,751 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:38:06,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:38:06,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:38:06,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:38:06,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:38:06,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:38:06,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:38:06,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:38:06,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:38:06,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:38:06,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:38:06,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:38:06,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:38:06,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:38:06,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:38:06,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:38:06,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:38:06,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:38:06,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:38:06,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:38:06,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:38:06,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:38:06,756 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_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 [2022-11-25 23:38:07,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:38:07,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:38:07,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:38:07,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:38:07,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:38:07,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-25 23:38:10,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:38:10,601 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:38:10,601 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-25 23:38:10,625 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/data/1f4d2a03e/a47e23b8ab8040fd8d9b8dcc513bee65/FLAG0ec8c18ae [2022-11-25 23:38:10,641 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/data/1f4d2a03e/a47e23b8ab8040fd8d9b8dcc513bee65 [2022-11-25 23:38:10,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:38:10,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:38:10,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:38:10,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:38:10,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:38:10,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:38:10" (1/1) ... [2022-11-25 23:38:10,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de5755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:10, skipping insertion in model container [2022-11-25 23:38:10,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:38:10" (1/1) ... [2022-11-25 23:38:10,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:38:10,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:38:10,987 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_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-25 23:38:11,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:38:11,372 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:38:11,390 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_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-25 23:38:11,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:38:11,534 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:38:11,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11 WrapperNode [2022-11-25 23:38:11,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:38:11,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:38:11,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:38:11,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:38:11,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,691 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 864 [2022-11-25 23:38:11,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:38:11,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:38:11,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:38:11,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:38:11,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,786 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:38:11,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:38:11,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:38:11,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:38:11,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (1/1) ... [2022-11-25 23:38:11,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:38:11,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:11,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:38:11,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:38:11,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:38:11,920 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:38:11,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:38:11,921 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-25 23:38:11,921 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-25 23:38:11,921 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:38:11,921 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:38:11,921 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:38:11,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:38:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:38:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:38:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 23:38:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 23:38:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:38:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:38:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:38:11,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:38:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:38:11,924 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:38:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:38:11,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:38:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:38:11,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:38:11,926 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:38:11,926 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:38:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:38:11,927 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:38:11,927 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:38:11,929 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:38:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:38:11,929 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:38:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:38:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:38:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:38:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:38:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-25 23:38:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-25 23:38:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:38:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:38:11,931 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:38:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:38:11,931 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:38:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:38:11,932 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:38:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:38:11,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:38:11,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:38:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:38:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:38:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:38:12,132 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:38:12,135 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:38:13,368 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:38:14,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:38:14,198 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:38:14,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:38:14 BoogieIcfgContainer [2022-11-25 23:38:14,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:38:14,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:38:14,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:38:14,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:38:14,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:38:10" (1/3) ... [2022-11-25 23:38:14,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428caf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:38:14, skipping insertion in model container [2022-11-25 23:38:14,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:38:11" (2/3) ... [2022-11-25 23:38:14,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428caf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:38:14, skipping insertion in model container [2022-11-25 23:38:14,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:38:14" (3/3) ... [2022-11-25 23:38:14,217 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2022-11-25 23:38:14,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:38:14,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:38:14,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:38:14,326 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;@3cfa7f6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:38:14,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:38:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-25 23:38:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:38:14,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:14,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:14,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333594, now seen corresponding path program 1 times [2022-11-25 23:38:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:14,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296990578] [2022-11-25 23:38:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:38:15,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:15,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296990578] [2022-11-25 23:38:15,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296990578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:15,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:15,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:38:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725876503] [2022-11-25 23:38:15,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:38:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:38:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:38:15,351 INFO L87 Difference]: Start difference. First operand has 365 states, 247 states have (on average 1.5951417004048583) internal successors, (394), 268 states have internal predecessors, (394), 92 states have call successors, (92), 24 states have call predecessors, (92), 24 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 23:38:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:15,955 INFO L93 Difference]: Finished difference Result 815 states and 1317 transitions. [2022-11-25 23:38:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:38:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2022-11-25 23:38:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:15,983 INFO L225 Difference]: With dead ends: 815 [2022-11-25 23:38:15,983 INFO L226 Difference]: Without dead ends: 463 [2022-11-25 23:38:15,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:15,998 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 249 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:15,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2225 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:38:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-25 23:38:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2022-11-25 23:38:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 248 states have (on average 1.5766129032258065) internal successors, (391), 267 states have internal predecessors, (391), 92 states have call successors, (92), 24 states have call predecessors, (92), 23 states have return successors, (87), 85 states have call predecessors, (87), 87 states have call successors, (87) [2022-11-25 23:38:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 570 transitions. [2022-11-25 23:38:16,097 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 570 transitions. Word has length 65 [2022-11-25 23:38:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:16,098 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 570 transitions. [2022-11-25 23:38:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 23:38:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 570 transitions. [2022-11-25 23:38:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 23:38:16,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:16,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:38:16,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1013499689, now seen corresponding path program 1 times [2022-11-25 23:38:16,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:16,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544685549] [2022-11-25 23:38:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:16,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:16,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544685549] [2022-11-25 23:38:16,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544685549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:16,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:16,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 23:38:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241205166] [2022-11-25 23:38:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:16,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:38:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:38:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:38:16,596 INFO L87 Difference]: Start difference. First operand 364 states and 570 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:38:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:20,161 INFO L93 Difference]: Finished difference Result 1231 states and 1959 transitions. [2022-11-25 23:38:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:38:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 68 [2022-11-25 23:38:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:20,171 INFO L225 Difference]: With dead ends: 1231 [2022-11-25 23:38:20,171 INFO L226 Difference]: Without dead ends: 883 [2022-11-25 23:38:20,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:38:20,175 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1697 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 4415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:20,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 2189 Invalid, 4415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [572 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-25 23:38:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-25 23:38:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2022-11-25 23:38:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 592 states have (on average 1.5962837837837838) internal successors, (945), 623 states have internal predecessors, (945), 193 states have call successors, (193), 48 states have call predecessors, (193), 52 states have return successors, (200), 191 states have call predecessors, (200), 188 states have call successors, (200) [2022-11-25 23:38:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1338 transitions. [2022-11-25 23:38:20,264 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1338 transitions. Word has length 68 [2022-11-25 23:38:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:20,264 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1338 transitions. [2022-11-25 23:38:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:38:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1338 transitions. [2022-11-25 23:38:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:38:20,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:20,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:20,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:38:20,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1534425063, now seen corresponding path program 1 times [2022-11-25 23:38:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:20,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207945594] [2022-11-25 23:38:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:20,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:21,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207945594] [2022-11-25 23:38:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207945594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:21,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:38:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978339361] [2022-11-25 23:38:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:38:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:38:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:21,513 INFO L87 Difference]: Start difference. First operand 838 states and 1338 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-25 23:38:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:26,155 INFO L93 Difference]: Finished difference Result 3638 states and 5935 transitions. [2022-11-25 23:38:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:38:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 73 [2022-11-25 23:38:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:26,177 INFO L225 Difference]: With dead ends: 3638 [2022-11-25 23:38:26,177 INFO L226 Difference]: Without dead ends: 2817 [2022-11-25 23:38:26,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:38:26,184 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 2140 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2239 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:26,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2239 Valid, 1846 Invalid, 4274 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [917 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 23:38:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-25 23:38:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2545. [2022-11-25 23:38:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 1792 states have (on average 1.5904017857142858) internal successors, (2850), 1905 states have internal predecessors, (2850), 607 states have call successors, (607), 129 states have call predecessors, (607), 145 states have return successors, (658), 581 states have call predecessors, (658), 602 states have call successors, (658) [2022-11-25 23:38:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4115 transitions. [2022-11-25 23:38:26,525 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4115 transitions. Word has length 73 [2022-11-25 23:38:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:26,528 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 4115 transitions. [2022-11-25 23:38:26,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-25 23:38:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4115 transitions. [2022-11-25 23:38:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:38:26,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:26,533 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:38:26,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash 588600825, now seen corresponding path program 1 times [2022-11-25 23:38:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059981775] [2022-11-25 23:38:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:26,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:26,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059981775] [2022-11-25 23:38:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059981775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:26,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:26,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:38:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605230642] [2022-11-25 23:38:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:26,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:38:26,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:38:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:26,851 INFO L87 Difference]: Start difference. First operand 2545 states and 4115 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:38:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:27,328 INFO L93 Difference]: Finished difference Result 4273 states and 6908 transitions. [2022-11-25 23:38:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:38:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 73 [2022-11-25 23:38:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:27,353 INFO L225 Difference]: With dead ends: 4273 [2022-11-25 23:38:27,354 INFO L226 Difference]: Without dead ends: 2746 [2022-11-25 23:38:27,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:27,372 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:27,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3286 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:38:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-11-25 23:38:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2022-11-25 23:38:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1843 states have (on average 1.5740640260444927) internal successors, (2901), 1958 states have internal predecessors, (2901), 607 states have call successors, (607), 129 states have call predecessors, (607), 167 states have return successors, (705), 601 states have call predecessors, (705), 602 states have call successors, (705) [2022-11-25 23:38:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 4213 transitions. [2022-11-25 23:38:27,745 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 4213 transitions. Word has length 73 [2022-11-25 23:38:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:27,746 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 4213 transitions. [2022-11-25 23:38:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:38:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 4213 transitions. [2022-11-25 23:38:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:38:27,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:27,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:38:27,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 926997819, now seen corresponding path program 1 times [2022-11-25 23:38:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:27,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006755737] [2022-11-25 23:38:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:27,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006755737] [2022-11-25 23:38:27,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006755737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:27,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:27,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:38:27,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485011146] [2022-11-25 23:38:27,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:38:27,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:38:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:27,995 INFO L87 Difference]: Start difference. First operand 2618 states and 4213 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:38:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:28,499 INFO L93 Difference]: Finished difference Result 4371 states and 7031 transitions. [2022-11-25 23:38:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:38:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2022-11-25 23:38:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:28,518 INFO L225 Difference]: With dead ends: 4371 [2022-11-25 23:38:28,518 INFO L226 Difference]: Without dead ends: 2797 [2022-11-25 23:38:28,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:28,529 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 31 mSDsluCounter, 2712 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:28,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3267 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:38:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-25 23:38:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2629. [2022-11-25 23:38:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 1854 states have (on average 1.570658036677454) internal successors, (2912), 1958 states have internal predecessors, (2912), 607 states have call successors, (607), 129 states have call predecessors, (607), 167 states have return successors, (705), 612 states have call predecessors, (705), 602 states have call successors, (705) [2022-11-25 23:38:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 4224 transitions. [2022-11-25 23:38:28,849 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 4224 transitions. Word has length 72 [2022-11-25 23:38:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:28,849 INFO L495 AbstractCegarLoop]: Abstraction has 2629 states and 4224 transitions. [2022-11-25 23:38:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:38:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 4224 transitions. [2022-11-25 23:38:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 23:38:28,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:28,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:38:28,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -408997713, now seen corresponding path program 1 times [2022-11-25 23:38:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:28,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545177341] [2022-11-25 23:38:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:29,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545177341] [2022-11-25 23:38:29,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545177341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:29,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:29,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:38:29,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607978343] [2022-11-25 23:38:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:38:29,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:38:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:38:29,138 INFO L87 Difference]: Start difference. First operand 2629 states and 4224 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 23:38:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:32,202 INFO L93 Difference]: Finished difference Result 5860 states and 9460 transitions. [2022-11-25 23:38:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:38:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 80 [2022-11-25 23:38:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:32,235 INFO L225 Difference]: With dead ends: 5860 [2022-11-25 23:38:32,236 INFO L226 Difference]: Without dead ends: 3919 [2022-11-25 23:38:32,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:38:32,249 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 1909 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:32,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2058 Valid, 1247 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 2622 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 23:38:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2022-11-25 23:38:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3787. [2022-11-25 23:38:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 2624 states have (on average 1.5282012195121952) internal successors, (4010), 2788 states have internal predecessors, (4010), 899 states have call successors, (899), 211 states have call predecessors, (899), 263 states have return successors, (1067), 893 states have call predecessors, (1067), 894 states have call successors, (1067) [2022-11-25 23:38:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 5976 transitions. [2022-11-25 23:38:32,729 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 5976 transitions. Word has length 80 [2022-11-25 23:38:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:32,730 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 5976 transitions. [2022-11-25 23:38:32,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 8 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 23:38:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 5976 transitions. [2022-11-25 23:38:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 23:38:32,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:32,732 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:32,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:38:32,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1770726822, now seen corresponding path program 1 times [2022-11-25 23:38:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936807719] [2022-11-25 23:38:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:38:33,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936807719] [2022-11-25 23:38:33,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936807719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:33,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:33,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:38:33,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710043765] [2022-11-25 23:38:33,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:33,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:38:33,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:38:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:38:33,037 INFO L87 Difference]: Start difference. First operand 3787 states and 5976 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-25 23:38:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:35,476 INFO L93 Difference]: Finished difference Result 7022 states and 11117 transitions. [2022-11-25 23:38:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:38:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 82 [2022-11-25 23:38:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:35,506 INFO L225 Difference]: With dead ends: 7022 [2022-11-25 23:38:35,506 INFO L226 Difference]: Without dead ends: 4150 [2022-11-25 23:38:35,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:38:35,521 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 955 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:35,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1374 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:38:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-25 23:38:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3868. [2022-11-25 23:38:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 2678 states have (on average 1.5220313666915608) internal successors, (4076), 2854 states have internal predecessors, (4076), 902 states have call successors, (902), 226 states have call predecessors, (902), 287 states have return successors, (1101), 893 states have call predecessors, (1101), 897 states have call successors, (1101) [2022-11-25 23:38:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6079 transitions. [2022-11-25 23:38:36,020 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6079 transitions. Word has length 82 [2022-11-25 23:38:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 6079 transitions. [2022-11-25 23:38:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-25 23:38:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6079 transitions. [2022-11-25 23:38:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 23:38:36,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:36,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:38:36,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -297281669, now seen corresponding path program 1 times [2022-11-25 23:38:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:36,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149880967] [2022-11-25 23:38:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:36,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:36,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149880967] [2022-11-25 23:38:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149880967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:36,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:36,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:38:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094907847] [2022-11-25 23:38:36,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:36,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:38:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:38:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:38:36,319 INFO L87 Difference]: Start difference. First operand 3868 states and 6079 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:38:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:37,429 INFO L93 Difference]: Finished difference Result 3972 states and 6241 transitions. [2022-11-25 23:38:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:38:37,430 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 85 [2022-11-25 23:38:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:37,457 INFO L225 Difference]: With dead ends: 3972 [2022-11-25 23:38:37,457 INFO L226 Difference]: Without dead ends: 3957 [2022-11-25 23:38:37,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:38:37,463 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 631 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:37,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1748 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:38:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-11-25 23:38:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3874. [2022-11-25 23:38:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 2684 states have (on average 1.5208643815201193) internal successors, (4082), 2860 states have internal predecessors, (4082), 902 states have call successors, (902), 226 states have call predecessors, (902), 287 states have return successors, (1101), 893 states have call predecessors, (1101), 897 states have call successors, (1101) [2022-11-25 23:38:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 6085 transitions. [2022-11-25 23:38:37,968 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 6085 transitions. Word has length 85 [2022-11-25 23:38:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:37,969 INFO L495 AbstractCegarLoop]: Abstraction has 3874 states and 6085 transitions. [2022-11-25 23:38:37,970 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:38:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 6085 transitions. [2022-11-25 23:38:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 23:38:37,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:37,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:37,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:38:37,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1900726984, now seen corresponding path program 1 times [2022-11-25 23:38:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:37,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222864815] [2022-11-25 23:38:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:38,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222864815] [2022-11-25 23:38:38,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222864815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:38,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:38:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 23:38:38,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16959969] [2022-11-25 23:38:38,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:38,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:38:38,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:38:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:38:38,315 INFO L87 Difference]: Start difference. First operand 3874 states and 6085 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:38:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:39,251 INFO L93 Difference]: Finished difference Result 7270 states and 11572 transitions. [2022-11-25 23:38:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:38:39,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 90 [2022-11-25 23:38:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:39,290 INFO L225 Difference]: With dead ends: 7270 [2022-11-25 23:38:39,290 INFO L226 Difference]: Without dead ends: 4088 [2022-11-25 23:38:39,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:38:39,311 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 359 mSDsluCounter, 3328 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:39,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 3838 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:38:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-11-25 23:38:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 4074. [2022-11-25 23:38:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2870 states have (on average 1.4989547038327526) internal successors, (4302), 3050 states have internal predecessors, (4302), 907 states have call successors, (907), 231 states have call predecessors, (907), 296 states have return successors, (1102), 898 states have call predecessors, (1102), 902 states have call successors, (1102) [2022-11-25 23:38:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6311 transitions. [2022-11-25 23:38:39,795 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6311 transitions. Word has length 90 [2022-11-25 23:38:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6311 transitions. [2022-11-25 23:38:39,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 5 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:38:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6311 transitions. [2022-11-25 23:38:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 23:38:39,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:39,801 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:38:39,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:38:39,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash 913826912, now seen corresponding path program 1 times [2022-11-25 23:38:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776182063] [2022-11-25 23:38:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:39,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:38:41,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776182063] [2022-11-25 23:38:41,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776182063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736620033] [2022-11-25 23:38:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:41,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:41,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:38:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:38:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:41,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736620033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:41,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:38:41,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-25 23:38:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953493810] [2022-11-25 23:38:41,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:41,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:38:41,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:38:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:41,676 INFO L87 Difference]: Start difference. First operand 4074 states and 6311 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:42,775 INFO L93 Difference]: Finished difference Result 10947 states and 17097 transitions. [2022-11-25 23:38:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:38:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-11-25 23:38:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:42,819 INFO L225 Difference]: With dead ends: 10947 [2022-11-25 23:38:42,819 INFO L226 Difference]: Without dead ends: 6892 [2022-11-25 23:38:42,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:42,839 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 518 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:42,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1151 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:38:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6892 states. [2022-11-25 23:38:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6892 to 6776. [2022-11-25 23:38:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 4825 states have (on average 1.5094300518134716) internal successors, (7283), 5135 states have internal predecessors, (7283), 1461 states have call successors, (1461), 375 states have call predecessors, (1461), 489 states have return successors, (1840), 1404 states have call predecessors, (1840), 1456 states have call successors, (1840) [2022-11-25 23:38:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 10584 transitions. [2022-11-25 23:38:43,671 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 10584 transitions. Word has length 98 [2022-11-25 23:38:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:43,672 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 10584 transitions. [2022-11-25 23:38:43,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 10584 transitions. [2022-11-25 23:38:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 23:38:43,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:43,676 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:38:43,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:43,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:38:43,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1736265868, now seen corresponding path program 1 times [2022-11-25 23:38:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:43,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589841820] [2022-11-25 23:38:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:43,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:38:45,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589841820] [2022-11-25 23:38:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589841820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085529315] [2022-11-25 23:38:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:45,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:45,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:45,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:38:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:38:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:45,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085529315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:45,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:38:45,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-25 23:38:45,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088462780] [2022-11-25 23:38:45,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:45,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:38:45,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:38:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:45,569 INFO L87 Difference]: Start difference. First operand 6776 states and 10584 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:46,936 INFO L93 Difference]: Finished difference Result 19052 states and 30041 transitions. [2022-11-25 23:38:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:38:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2022-11-25 23:38:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:47,021 INFO L225 Difference]: With dead ends: 19052 [2022-11-25 23:38:47,021 INFO L226 Difference]: Without dead ends: 12298 [2022-11-25 23:38:47,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:47,055 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 517 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:47,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1168 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:38:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12298 states. [2022-11-25 23:38:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12298 to 12181. [2022-11-25 23:38:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 8736 states have (on average 1.5154532967032968) internal successors, (13239), 9306 states have internal predecessors, (13239), 2569 states have call successors, (2569), 663 states have call predecessors, (2569), 875 states have return successors, (3388), 2416 states have call predecessors, (3388), 2564 states have call successors, (3388) [2022-11-25 23:38:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 19196 transitions. [2022-11-25 23:38:48,569 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 19196 transitions. Word has length 99 [2022-11-25 23:38:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:48,570 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 19196 transitions. [2022-11-25 23:38:48,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 19196 transitions. [2022-11-25 23:38:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 23:38:48,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:48,574 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:38:48,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 23:38:48,788 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1958047486, now seen corresponding path program 1 times [2022-11-25 23:38:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681680117] [2022-11-25 23:38:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:38:49,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681680117] [2022-11-25 23:38:49,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681680117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616994309] [2022-11-25 23:38:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:49,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:49,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:38:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:38:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:50,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:50,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616994309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:50,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:38:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-25 23:38:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488977517] [2022-11-25 23:38:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:38:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:38:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:50,353 INFO L87 Difference]: Start difference. First operand 12181 states and 19196 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:52,200 INFO L93 Difference]: Finished difference Result 35263 states and 56274 transitions. [2022-11-25 23:38:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:38:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2022-11-25 23:38:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:52,341 INFO L225 Difference]: With dead ends: 35263 [2022-11-25 23:38:52,341 INFO L226 Difference]: Without dead ends: 23110 [2022-11-25 23:38:52,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:52,398 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 516 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:52,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1174 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:38:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23110 states. [2022-11-25 23:38:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23110 to 22992. [2022-11-25 23:38:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22992 states, 16559 states have (on average 1.517664110151579) internal successors, (25131), 17649 states have internal predecessors, (25131), 4785 states have call successors, (4785), 1239 states have call predecessors, (4785), 1647 states have return successors, (6736), 4440 states have call predecessors, (6736), 4780 states have call successors, (6736) [2022-11-25 23:38:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22992 states to 22992 states and 36652 transitions. [2022-11-25 23:38:55,049 INFO L78 Accepts]: Start accepts. Automaton has 22992 states and 36652 transitions. Word has length 99 [2022-11-25 23:38:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:55,050 INFO L495 AbstractCegarLoop]: Abstraction has 22992 states and 36652 transitions. [2022-11-25 23:38:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:38:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22992 states and 36652 transitions. [2022-11-25 23:38:55,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 23:38:55,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:55,054 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:38:55,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:55,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash -570051178, now seen corresponding path program 1 times [2022-11-25 23:38:55,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:55,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556084405] [2022-11-25 23:38:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:38:56,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:56,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556084405] [2022-11-25 23:38:56,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556084405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:38:56,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139518777] [2022-11-25 23:38:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:56,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:56,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:56,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:38:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:38:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:38:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:38:57,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:38:57,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139518777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:38:57,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:38:57,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-25 23:38:57,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98982400] [2022-11-25 23:38:57,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:38:57,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:38:57,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:38:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:38:57,228 INFO L87 Difference]: Start difference. First operand 22992 states and 36652 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:39:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:01,127 INFO L93 Difference]: Finished difference Result 67686 states and 109967 transitions. [2022-11-25 23:39:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:39:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 100 [2022-11-25 23:39:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:01,533 INFO L225 Difference]: With dead ends: 67686 [2022-11-25 23:39:01,533 INFO L226 Difference]: Without dead ends: 44734 [2022-11-25 23:39:01,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:39:01,639 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 515 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:01,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1180 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:39:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44734 states. [2022-11-25 23:39:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44734 to 44615. [2022-11-25 23:39:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44615 states, 32206 states have (on average 1.5173259641060672) internal successors, (48867), 34336 states have internal predecessors, (48867), 9217 states have call successors, (9217), 2391 states have call predecessors, (9217), 3191 states have return successors, (14332), 8488 states have call predecessors, (14332), 9212 states have call successors, (14332) [2022-11-25 23:39:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44615 states to 44615 states and 72416 transitions. [2022-11-25 23:39:06,592 INFO L78 Accepts]: Start accepts. Automaton has 44615 states and 72416 transitions. Word has length 100 [2022-11-25 23:39:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:06,595 INFO L495 AbstractCegarLoop]: Abstraction has 44615 states and 72416 transitions. [2022-11-25 23:39:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:39:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 44615 states and 72416 transitions. [2022-11-25 23:39:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:39:06,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:06,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:06,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:06,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:39:06,808 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:06,808 INFO L85 PathProgramCache]: Analyzing trace with hash -491834684, now seen corresponding path program 1 times [2022-11-25 23:39:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:06,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653095858] [2022-11-25 23:39:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:06,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:39:08,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653095858] [2022-11-25 23:39:08,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653095858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:08,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636715354] [2022-11-25 23:39:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:08,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:08,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:39:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:39:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:39:08,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:08,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636715354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:08,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:39:08,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-25 23:39:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258424757] [2022-11-25 23:39:08,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:08,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:39:08,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:39:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:39:08,532 INFO L87 Difference]: Start difference. First operand 44615 states and 72416 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:39:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:12,343 INFO L93 Difference]: Finished difference Result 47438 states and 77277 transitions. [2022-11-25 23:39:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:39:12,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 101 [2022-11-25 23:39:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:12,572 INFO L225 Difference]: With dead ends: 47438 [2022-11-25 23:39:12,573 INFO L226 Difference]: Without dead ends: 47427 [2022-11-25 23:39:12,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:39:12,600 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 501 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:12,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1178 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:39:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47427 states. [2022-11-25 23:39:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47427 to 47307. [2022-11-25 23:39:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47307 states, 34152 states have (on average 1.5163387210119466) internal successors, (51786), 36412 states have internal predecessors, (51786), 9771 states have call successors, (9771), 2535 states have call predecessors, (9771), 3383 states have return successors, (15519), 8993 states have call predecessors, (15519), 9766 states have call successors, (15519) [2022-11-25 23:39:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47307 states to 47307 states and 77076 transitions. [2022-11-25 23:39:17,322 INFO L78 Accepts]: Start accepts. Automaton has 47307 states and 77076 transitions. Word has length 101 [2022-11-25 23:39:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:17,323 INFO L495 AbstractCegarLoop]: Abstraction has 47307 states and 77076 transitions. [2022-11-25 23:39:17,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:39:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47307 states and 77076 transitions. [2022-11-25 23:39:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 23:39:17,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:17,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-25 23:39:17,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:17,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:39:17,538 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash -743592040, now seen corresponding path program 1 times [2022-11-25 23:39:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:17,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126098959] [2022-11-25 23:39:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-25 23:39:17,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126098959] [2022-11-25 23:39:17,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126098959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:39:17,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440046305] [2022-11-25 23:39:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:17,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:17,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:17,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:17,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c8b569-3e60-4212-b2e1-e6e2ab506f7b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:39:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:39:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:39:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:39:18,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:39:18,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440046305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:39:18,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:39:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 23:39:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031669393] [2022-11-25 23:39:18,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:39:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:39:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:18,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:39:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:39:18,174 INFO L87 Difference]: Start difference. First operand 47307 states and 77076 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23)