./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/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_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 15:51:35,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:51:35,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:51:36,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:51:36,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:51:36,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:51:36,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:51:36,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:51:36,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:51:36,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:51:36,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:51:36,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:51:36,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:51:36,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:51:36,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:51:36,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:51:36,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:51:36,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:51:36,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:51:36,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:51:36,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:51:36,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:51:36,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:51:36,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:51:36,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:51:36,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:51:36,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:51:36,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:51:36,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:51:36,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:51:36,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:51:36,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:51:36,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:51:36,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:51:36,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:51:36,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:51:36,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:51:36,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:51:36,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:51:36,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:51:36,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:51:36,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:51:36,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:51:36,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:51:36,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:51:36,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:51:36,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:51:36,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:51:36,122 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:51:36,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:51:36,123 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:51:36,123 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:51:36,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:51:36,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:51:36,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:51:36,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:51:36,125 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:51:36,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:51:36,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:51:36,126 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:51:36,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:51:36,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:51:36,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:51:36,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:51:36,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:51:36,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:51:36,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:51:36,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:51:36,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:51:36,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:51:36,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:51:36,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:51:36,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:51:36,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:51:36,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:51:36,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:51:36,132 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:51:36,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:51:36,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:51:36,133 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:51:36,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:51:36,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:51:36,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:51:36,134 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_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5a3f22f9d7a0aaa2c9864b464fdc1b701547a697c01ddf6ee0cf69e3554ef9 [2022-11-23 15:51:36,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:51:36,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:51:36,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:51:36,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:51:36,511 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:51:36,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-23 15:51:39,464 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:51:39,852 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:51:39,852 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c [2022-11-23 15:51:39,879 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/data/ad9f30ebd/20d2f6ee0a154f4da8f55e63b8ed80ac/FLAG5c0438cf3 [2022-11-23 15:51:39,897 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/data/ad9f30ebd/20d2f6ee0a154f4da8f55e63b8ed80ac [2022-11-23 15:51:39,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:51:39,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:51:39,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:51:39,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:51:39,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:51:39,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:39" (1/1) ... [2022-11-23 15:51:39,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6025be3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:39, skipping insertion in model container [2022-11-23 15:51:39,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:51:39" (1/1) ... [2022-11-23 15:51:39,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:51:39,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:51:40,142 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_06da98cf-33e2-45e2-b6b2-bee8e26ed971/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-23 15:51:40,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:51:40,520 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:51:40,533 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_06da98cf-33e2-45e2-b6b2-bee8e26ed971/sv-benchmarks/c/product-lines/elevator_spec9_product29.cil.c[1700,1713] [2022-11-23 15:51:40,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:51:40,731 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:51:40,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40 WrapperNode [2022-11-23 15:51:40,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:51:40,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:51:40,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:51:40,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:51:40,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,842 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 864 [2022-11-23 15:51:40,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:51:40,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:51:40,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:51:40,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:51:40,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:51:40,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:51:40,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:51:40,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:51:40,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (1/1) ... [2022-11-23 15:51:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:51:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:51:41,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:51:41,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:51:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:51:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:51:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:51:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:51:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:51:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:51:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:51:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:51:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:51:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:51:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:51:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:51:41,082 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:51:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:51:41,082 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:51:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:51:41,083 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:51:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:51:41,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:51:41,083 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:51:41,084 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:51:41,084 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:51:41,085 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:51:41,085 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:51:41,086 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:51:41,086 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:51:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:51:41,087 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:51:41,087 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:51:41,087 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:51:41,089 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:51:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:51:41,090 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:51:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:51:41,090 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:51:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:51:41,091 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:51:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-23 15:51:41,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-23 15:51:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:51:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:51:41,092 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:51:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:51:41,092 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:51:41,093 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:51:41,093 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:51:41,094 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:51:41,094 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:51:41,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:51:41,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:51:41,095 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:51:41,095 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:51:41,293 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:51:41,296 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:51:42,715 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:51:43,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:51:43,604 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:51:43,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:43 BoogieIcfgContainer [2022-11-23 15:51:43,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:51:43,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:51:43,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:51:43,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:51:43,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:51:39" (1/3) ... [2022-11-23 15:51:43,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0f515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:43, skipping insertion in model container [2022-11-23 15:51:43,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:51:40" (2/3) ... [2022-11-23 15:51:43,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0f515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:51:43, skipping insertion in model container [2022-11-23 15:51:43,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:51:43" (3/3) ... [2022-11-23 15:51:43,619 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product29.cil.c [2022-11-23 15:51:43,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:51:43,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:51:43,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:51:43,729 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;@1344d7fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:51:43,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:51:43,737 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) [2022-11-23 15:51:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 15:51:43,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:43,774 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] [2022-11-23 15:51:43,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333594, now seen corresponding path program 1 times [2022-11-23 15:51:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109959728] [2022-11-23 15:51:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:51:44,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109959728] [2022-11-23 15:51:44,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109959728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:44,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:44,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:51:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717999330] [2022-11-23 15:51:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:51:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:51:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:51:44,669 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) [2022-11-23 15:51:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:45,219 INFO L93 Difference]: Finished difference Result 815 states and 1317 transitions. [2022-11-23 15:51:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:51:45,222 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 [2022-11-23 15:51:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:45,247 INFO L225 Difference]: With dead ends: 815 [2022-11-23 15:51:45,247 INFO L226 Difference]: Without dead ends: 463 [2022-11-23 15:51:45,257 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 [2022-11-23 15:51:45,261 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 [2022-11-23 15:51:45,262 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] [2022-11-23 15:51:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-23 15:51:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2022-11-23 15:51:45,378 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) [2022-11-23 15:51:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 570 transitions. [2022-11-23 15:51:45,388 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 570 transitions. Word has length 65 [2022-11-23 15:51:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:45,391 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 570 transitions. [2022-11-23 15:51:45,391 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) [2022-11-23 15:51:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 570 transitions. [2022-11-23 15:51:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 15:51:45,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:45,405 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] [2022-11-23 15:51:45,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:51:45,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1013499689, now seen corresponding path program 1 times [2022-11-23 15:51:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:45,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182264986] [2022-11-23 15:51:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:51:45,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:45,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182264986] [2022-11-23 15:51:45,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182264986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:45,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:45,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 15:51:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72161828] [2022-11-23 15:51:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:51:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:45,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:51:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:51:45,900 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) [2022-11-23 15:51:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:49,616 INFO L93 Difference]: Finished difference Result 1231 states and 1959 transitions. [2022-11-23 15:51:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:51:49,617 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 [2022-11-23 15:51:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:49,623 INFO L225 Difference]: With dead ends: 1231 [2022-11-23 15:51:49,623 INFO L226 Difference]: Without dead ends: 883 [2022-11-23 15:51:49,626 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 [2022-11-23 15:51:49,627 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1697 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:51:49,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 2189 Invalid, 4415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [572 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-23 15:51:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-23 15:51:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2022-11-23 15:51:49,693 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) [2022-11-23 15:51:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1338 transitions. [2022-11-23 15:51:49,700 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1338 transitions. Word has length 68 [2022-11-23 15:51:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:49,701 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1338 transitions. [2022-11-23 15:51:49,701 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) [2022-11-23 15:51:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1338 transitions. [2022-11-23 15:51:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:51:49,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:49,705 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] [2022-11-23 15:51:49,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:51:49,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1534425063, now seen corresponding path program 1 times [2022-11-23 15:51:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:49,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125700036] [2022-11-23 15:51:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:51:51,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:51,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125700036] [2022-11-23 15:51:51,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125700036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:51,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:51,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:51:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100680236] [2022-11-23 15:51:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:51:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:51:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:51:51,025 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) [2022-11-23 15:51:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:55,692 INFO L93 Difference]: Finished difference Result 3638 states and 5935 transitions. [2022-11-23 15:51:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:51:55,693 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 [2022-11-23 15:51:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:55,726 INFO L225 Difference]: With dead ends: 3638 [2022-11-23 15:51:55,727 INFO L226 Difference]: Without dead ends: 2817 [2022-11-23 15:51:55,738 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 [2022-11-23 15:51:55,742 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 2144 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 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 [2022-11-23 15:51:55,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2243 Valid, 1846 Invalid, 4274 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [917 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-23 15:51:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-23 15:51:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2545. [2022-11-23 15:51:56,028 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) [2022-11-23 15:51:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4115 transitions. [2022-11-23 15:51:56,046 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4115 transitions. Word has length 73 [2022-11-23 15:51:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:56,046 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 4115 transitions. [2022-11-23 15:51:56,047 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) [2022-11-23 15:51:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4115 transitions. [2022-11-23 15:51:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:51:56,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:56,050 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] [2022-11-23 15:51:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:51:56,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 588600825, now seen corresponding path program 1 times [2022-11-23 15:51:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519282655] [2022-11-23 15:51:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:56,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:51:56,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:56,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519282655] [2022-11-23 15:51:56,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519282655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:56,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:56,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:51:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274211270] [2022-11-23 15:51:56,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:56,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:51:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:51:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:51:56,378 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) [2022-11-23 15:51:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:56,882 INFO L93 Difference]: Finished difference Result 4273 states and 6908 transitions. [2022-11-23 15:51:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:51:56,882 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 [2022-11-23 15:51:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:56,902 INFO L225 Difference]: With dead ends: 4273 [2022-11-23 15:51:56,902 INFO L226 Difference]: Without dead ends: 2746 [2022-11-23 15:51:56,909 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 [2022-11-23 15:51:56,911 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 [2022-11-23 15:51:56,911 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] [2022-11-23 15:51:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-11-23 15:51:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2022-11-23 15:51:57,186 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) [2022-11-23 15:51:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 4213 transitions. [2022-11-23 15:51:57,203 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 4213 transitions. Word has length 73 [2022-11-23 15:51:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:57,204 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 4213 transitions. [2022-11-23 15:51:57,204 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) [2022-11-23 15:51:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 4213 transitions. [2022-11-23 15:51:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:51:57,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:57,207 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] [2022-11-23 15:51:57,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:51:57,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash 926997819, now seen corresponding path program 1 times [2022-11-23 15:51:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61146499] [2022-11-23 15:51:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:51:57,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61146499] [2022-11-23 15:51:57,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61146499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:57,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:57,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:51:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415666797] [2022-11-23 15:51:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:57,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:51:57,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:51:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:51:57,521 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) [2022-11-23 15:51:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:51:57,995 INFO L93 Difference]: Finished difference Result 4371 states and 7031 transitions. [2022-11-23 15:51:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:51:57,996 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 [2022-11-23 15:51:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:51:58,043 INFO L225 Difference]: With dead ends: 4371 [2022-11-23 15:51:58,044 INFO L226 Difference]: Without dead ends: 2797 [2022-11-23 15:51:58,051 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 [2022-11-23 15:51:58,054 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 [2022-11-23 15:51:58,055 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] [2022-11-23 15:51:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-23 15:51:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2629. [2022-11-23 15:51:58,388 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) [2022-11-23 15:51:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 4224 transitions. [2022-11-23 15:51:58,405 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 4224 transitions. Word has length 72 [2022-11-23 15:51:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:51:58,406 INFO L495 AbstractCegarLoop]: Abstraction has 2629 states and 4224 transitions. [2022-11-23 15:51:58,406 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) [2022-11-23 15:51:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 4224 transitions. [2022-11-23 15:51:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 15:51:58,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:51:58,409 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] [2022-11-23 15:51:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:51:58,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:51:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:51:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash -408997713, now seen corresponding path program 1 times [2022-11-23 15:51:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:51:58,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679329248] [2022-11-23 15:51:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:51:58,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:51:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:51:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:51:58,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:51:58,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679329248] [2022-11-23 15:51:58,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679329248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:58,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:51:58,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:51:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067496555] [2022-11-23 15:51:58,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:58,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:51:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:51:58,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:51:58,733 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) [2022-11-23 15:52:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:01,805 INFO L93 Difference]: Finished difference Result 5860 states and 9460 transitions. [2022-11-23 15:52:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:52:01,806 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 [2022-11-23 15:52:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:01,836 INFO L225 Difference]: With dead ends: 5860 [2022-11-23 15:52:01,837 INFO L226 Difference]: Without dead ends: 3919 [2022-11-23 15:52:01,850 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 [2022-11-23 15:52:01,852 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 1918 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2067 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 3411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:01,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2067 Valid, 1247 Invalid, 3411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 2622 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 15:52:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2022-11-23 15:52:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3787. [2022-11-23 15:52:02,344 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) [2022-11-23 15:52:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 5976 transitions. [2022-11-23 15:52:02,367 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 5976 transitions. Word has length 80 [2022-11-23 15:52:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:02,368 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 5976 transitions. [2022-11-23 15:52:02,368 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) [2022-11-23 15:52:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 5976 transitions. [2022-11-23 15:52:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 15:52:02,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:02,373 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] [2022-11-23 15:52:02,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:52:02,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1770726822, now seen corresponding path program 1 times [2022-11-23 15:52:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494259233] [2022-11-23 15:52:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:02,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:52:02,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494259233] [2022-11-23 15:52:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494259233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:02,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:02,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:52:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603131768] [2022-11-23 15:52:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:52:02,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:52:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:52:02,682 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) [2022-11-23 15:52:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:05,396 INFO L93 Difference]: Finished difference Result 7022 states and 11117 transitions. [2022-11-23 15:52:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:52:05,398 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 [2022-11-23 15:52:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:05,426 INFO L225 Difference]: With dead ends: 7022 [2022-11-23 15:52:05,427 INFO L226 Difference]: Without dead ends: 4150 [2022-11-23 15:52:05,439 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 [2022-11-23 15:52:05,442 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 955 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:05,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1374 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 15:52:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-23 15:52:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3868. [2022-11-23 15:52:05,903 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) [2022-11-23 15:52:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 6079 transitions. [2022-11-23 15:52:05,936 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 6079 transitions. Word has length 82 [2022-11-23 15:52:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:05,937 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 6079 transitions. [2022-11-23 15:52:05,938 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) [2022-11-23 15:52:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 6079 transitions. [2022-11-23 15:52:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 15:52:05,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:05,941 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] [2022-11-23 15:52:05,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:52:05,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash -297281669, now seen corresponding path program 1 times [2022-11-23 15:52:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216315518] [2022-11-23 15:52:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:05,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:06,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216315518] [2022-11-23 15:52:06,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216315518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:06,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:06,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:52:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661373249] [2022-11-23 15:52:06,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:52:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:52:06,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:52:06,227 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) [2022-11-23 15:52:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:07,170 INFO L93 Difference]: Finished difference Result 3972 states and 6241 transitions. [2022-11-23 15:52:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:52:07,170 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 [2022-11-23 15:52:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:07,198 INFO L225 Difference]: With dead ends: 3972 [2022-11-23 15:52:07,198 INFO L226 Difference]: Without dead ends: 3957 [2022-11-23 15:52:07,203 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 [2022-11-23 15:52:07,204 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 632 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 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 [2022-11-23 15:52:07,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1748 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:52:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2022-11-23 15:52:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3874. [2022-11-23 15:52:07,706 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) [2022-11-23 15:52:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 6085 transitions. [2022-11-23 15:52:07,734 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 6085 transitions. Word has length 85 [2022-11-23 15:52:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:07,735 INFO L495 AbstractCegarLoop]: Abstraction has 3874 states and 6085 transitions. [2022-11-23 15:52:07,735 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) [2022-11-23 15:52:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 6085 transitions. [2022-11-23 15:52:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 15:52:07,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:07,738 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] [2022-11-23 15:52:07,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:52:07,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1900726984, now seen corresponding path program 1 times [2022-11-23 15:52:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716145494] [2022-11-23 15:52:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:08,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716145494] [2022-11-23 15:52:08,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716145494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:08,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:52:08,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 15:52:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074398172] [2022-11-23 15:52:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:08,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:52:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:52:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:52:08,080 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) [2022-11-23 15:52:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:09,142 INFO L93 Difference]: Finished difference Result 7270 states and 11572 transitions. [2022-11-23 15:52:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:52:09,143 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 [2022-11-23 15:52:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:09,191 INFO L225 Difference]: With dead ends: 7270 [2022-11-23 15:52:09,191 INFO L226 Difference]: Without dead ends: 4088 [2022-11-23 15:52:09,212 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 [2022-11-23 15:52:09,214 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:52:09,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 3838 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:52:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-11-23 15:52:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 4074. [2022-11-23 15:52:09,745 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) [2022-11-23 15:52:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6311 transitions. [2022-11-23 15:52:09,769 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6311 transitions. Word has length 90 [2022-11-23 15:52:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:09,770 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6311 transitions. [2022-11-23 15:52:09,771 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) [2022-11-23 15:52:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6311 transitions. [2022-11-23 15:52:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:52:09,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:09,774 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] [2022-11-23 15:52:09,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:52:09,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 913826912, now seen corresponding path program 1 times [2022-11-23 15:52:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:09,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586188615] [2022-11-23 15:52:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:52:11,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:11,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586188615] [2022-11-23 15:52:11,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586188615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:11,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305129858] [2022-11-23 15:52:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:11,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:11,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:52:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:11,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:11,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305129858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:11,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:11,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-23 15:52:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900076952] [2022-11-23 15:52:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:52:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:52:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:11,635 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) [2022-11-23 15:52:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:12,614 INFO L93 Difference]: Finished difference Result 10947 states and 17097 transitions. [2022-11-23 15:52:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:52:12,615 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 [2022-11-23 15:52:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:12,657 INFO L225 Difference]: With dead ends: 10947 [2022-11-23 15:52:12,657 INFO L226 Difference]: Without dead ends: 6892 [2022-11-23 15:52:12,679 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 [2022-11-23 15:52:12,680 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 518 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-23 15:52:12,680 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] [2022-11-23 15:52:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6892 states. [2022-11-23 15:52:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6892 to 6776. [2022-11-23 15:52:13,660 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) [2022-11-23 15:52:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 10584 transitions. [2022-11-23 15:52:13,725 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 10584 transitions. Word has length 98 [2022-11-23 15:52:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:13,726 INFO L495 AbstractCegarLoop]: Abstraction has 6776 states and 10584 transitions. [2022-11-23 15:52:13,726 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) [2022-11-23 15:52:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 10584 transitions. [2022-11-23 15:52:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:52:13,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:13,734 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] [2022-11-23 15:52:13,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:52:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:13,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1736265868, now seen corresponding path program 1 times [2022-11-23 15:52:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:13,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076996024] [2022-11-23 15:52:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:52:15,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:15,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076996024] [2022-11-23 15:52:15,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076996024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:15,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624222064] [2022-11-23 15:52:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:15,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:15,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:52:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:15,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:15,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624222064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:15,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:15,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-23 15:52:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482347891] [2022-11-23 15:52:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:15,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:52:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:52:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:15,724 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) [2022-11-23 15:52:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:17,201 INFO L93 Difference]: Finished difference Result 19052 states and 30041 transitions. [2022-11-23 15:52:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:52:17,201 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 [2022-11-23 15:52:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:17,289 INFO L225 Difference]: With dead ends: 19052 [2022-11-23 15:52:17,289 INFO L226 Difference]: Without dead ends: 12298 [2022-11-23 15:52:17,323 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 [2022-11-23 15:52:17,324 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 [2022-11-23 15:52:17,324 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] [2022-11-23 15:52:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12298 states. [2022-11-23 15:52:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12298 to 12181. [2022-11-23 15:52:18,873 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) [2022-11-23 15:52:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 19196 transitions. [2022-11-23 15:52:18,965 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 19196 transitions. Word has length 99 [2022-11-23 15:52:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:18,966 INFO L495 AbstractCegarLoop]: Abstraction has 12181 states and 19196 transitions. [2022-11-23 15:52:18,966 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) [2022-11-23 15:52:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 19196 transitions. [2022-11-23 15:52:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:52:18,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:18,971 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] [2022-11-23 15:52:18,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:19,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1958047486, now seen corresponding path program 1 times [2022-11-23 15:52:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:19,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342489374] [2022-11-23 15:52:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:52:20,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342489374] [2022-11-23 15:52:20,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342489374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959093307] [2022-11-23 15:52:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:20,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:20,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:20,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:52:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:21,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:21,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:21,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959093307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:21,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:21,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-23 15:52:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422657251] [2022-11-23 15:52:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:52:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:52:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:21,281 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) [2022-11-23 15:52:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:23,457 INFO L93 Difference]: Finished difference Result 35263 states and 56274 transitions. [2022-11-23 15:52:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:52:23,457 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 [2022-11-23 15:52:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:23,600 INFO L225 Difference]: With dead ends: 35263 [2022-11-23 15:52:23,600 INFO L226 Difference]: Without dead ends: 23110 [2022-11-23 15:52:23,659 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 [2022-11-23 15:52:23,660 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 [2022-11-23 15:52:23,661 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] [2022-11-23 15:52:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23110 states. [2022-11-23 15:52:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23110 to 22992. [2022-11-23 15:52:25,852 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) [2022-11-23 15:52:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22992 states to 22992 states and 36652 transitions. [2022-11-23 15:52:26,023 INFO L78 Accepts]: Start accepts. Automaton has 22992 states and 36652 transitions. Word has length 99 [2022-11-23 15:52:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 22992 states and 36652 transitions. [2022-11-23 15:52:26,024 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) [2022-11-23 15:52:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 22992 states and 36652 transitions. [2022-11-23 15:52:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:52:26,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:26,031 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] [2022-11-23 15:52:26,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:52:26,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2108189578, now seen corresponding path program 1 times [2022-11-23 15:52:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:26,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976799707] [2022-11-23 15:52:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:52:28,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976799707] [2022-11-23 15:52:28,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976799707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144448891] [2022-11-23 15:52:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:28,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:28,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:28,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:28,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:52:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:28,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:28,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:28,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144448891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:28,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:28,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-23 15:52:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888691550] [2022-11-23 15:52:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:28,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:52:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:52:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:28,503 INFO L87 Difference]: Start difference. First operand 22992 states and 36652 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) [2022-11-23 15:52:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:32,384 INFO L93 Difference]: Finished difference Result 67686 states and 109967 transitions. [2022-11-23 15:52:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:52:32,385 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 [2022-11-23 15:52:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:32,726 INFO L225 Difference]: With dead ends: 67686 [2022-11-23 15:52:32,727 INFO L226 Difference]: Without dead ends: 44734 [2022-11-23 15:52:32,859 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 [2022-11-23 15:52:32,861 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 [2022-11-23 15:52:32,861 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] [2022-11-23 15:52:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44734 states. [2022-11-23 15:52:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44734 to 44615. [2022-11-23 15:52:37,797 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) [2022-11-23 15:52:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44615 states to 44615 states and 72416 transitions. [2022-11-23 15:52:38,157 INFO L78 Accepts]: Start accepts. Automaton has 44615 states and 72416 transitions. Word has length 101 [2022-11-23 15:52:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:52:38,158 INFO L495 AbstractCegarLoop]: Abstraction has 44615 states and 72416 transitions. [2022-11-23 15:52:38,158 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) [2022-11-23 15:52:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 44615 states and 72416 transitions. [2022-11-23 15:52:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 15:52:38,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:52:38,163 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, 1] [2022-11-23 15:52:38,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:52:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:52:38,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:52:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:52:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -929484828, now seen corresponding path program 1 times [2022-11-23 15:52:38,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:52:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264167560] [2022-11-23 15:52:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:52:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:52:40,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:52:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264167560] [2022-11-23 15:52:40,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264167560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:52:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889122316] [2022-11-23 15:52:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:52:40,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:52:40,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:52:40,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:52:40,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06da98cf-33e2-45e2-b6b2-bee8e26ed971/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:52:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:52:40,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:52:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:52:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:52:40,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:52:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889122316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:52:40,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:52:40,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-11-23 15:52:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085363259] [2022-11-23 15:52:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:52:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:52:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:52:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:52:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:40,443 INFO L87 Difference]: Start difference. First operand 44615 states and 72416 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-23 15:52:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:52:44,158 INFO L93 Difference]: Finished difference Result 47438 states and 77277 transitions. [2022-11-23 15:52:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:52:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 102 [2022-11-23 15:52:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:52:44,405 INFO L225 Difference]: With dead ends: 47438 [2022-11-23 15:52:44,406 INFO L226 Difference]: Without dead ends: 47427 [2022-11-23 15:52:44,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:52:44,438 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 [2022-11-23 15:52:44,439 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] [2022-11-23 15:52:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47427 states.