./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:45:36,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:45:36,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:45:36,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:45:36,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:45:36,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:45:36,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:45:36,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:45:36,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:45:36,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:45:36,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:45:36,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:45:36,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:45:36,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:45:36,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:45:36,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:45:36,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:45:36,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:45:36,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:45:36,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:45:36,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:45:36,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:45:36,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:45:36,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:45:36,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:45:36,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:45:36,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:45:36,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:45:36,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:45:36,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:45:36,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:45:36,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:45:36,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:45:36,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:45:36,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:45:36,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:45:36,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:45:36,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:45:36,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:45:36,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:45:36,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:45:36,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:45:36,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:45:36,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:45:36,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:45:36,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:45:36,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:45:36,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:45:36,610 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:45:36,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:45:36,611 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:45:36,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:45:36,611 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:45:36,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:45:36,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:45:36,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:45:36,612 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:45:36,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:45:36,613 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:45:36,613 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:45:36,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:45:36,614 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:45:36,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:45:36,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:45:36,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:45:36,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:45:36,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:45:36,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:45:36,615 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:45:36,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:45:36,616 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:45:36,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:45:36,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:45:36,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:45:36,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:36,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:45:36,624 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:45:36,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:45:36,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:45:36,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:45:36,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:45:36,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:45:36,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:45:36,629 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_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2022-11-03 02:45:36,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:45:36,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:45:36,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:45:36,969 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:45:36,969 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:45:36,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2022-11-03 02:45:37,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/data/1de4a8dc0/5298ab41812640cc9119498cb5864e64/FLAG73644619f [2022-11-03 02:45:37,843 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:45:37,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2022-11-03 02:45:37,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/data/1de4a8dc0/5298ab41812640cc9119498cb5864e64/FLAG73644619f [2022-11-03 02:45:37,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/data/1de4a8dc0/5298ab41812640cc9119498cb5864e64 [2022-11-03 02:45:37,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:45:37,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:45:37,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:37,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:45:37,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:45:37,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:37" (1/1) ... [2022-11-03 02:45:37,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c78cb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:37, skipping insertion in model container [2022-11-03 02:45:37,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:37" (1/1) ... [2022-11-03 02:45:38,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:45:38,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:45:38,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2022-11-03 02:45:38,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:38,779 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:45:38,800 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2022-11-03 02:45:38,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:39,051 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:45:39,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39 WrapperNode [2022-11-03 02:45:39,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:39,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:39,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:45:39,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:45:39,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,160 INFO L138 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 743 [2022-11-03 02:45:39,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:39,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:45:39,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:45:39,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:45:39,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:45:39,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:45:39,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:45:39,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:45:39,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (1/1) ... [2022-11-03 02:45:39,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:39,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:45:39,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:45:39,374 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 02:45:39,375 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 02:45:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:45:39,375 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:45:39,376 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:45:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:45:39,376 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:45:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:45:39,377 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:45:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:45:39,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:45:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:45:39,378 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:45:39,378 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:45:39,379 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:45:39,380 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 02:45:39,380 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 02:45:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:45:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:45:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:45:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:45:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:45:39,382 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:45:39,382 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:45:39,382 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:45:39,382 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:45:39,383 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:45:39,383 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:45:39,383 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:45:39,383 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:45:39,386 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:45:39,386 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:45:39,386 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:45:39,387 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:45:39,387 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:45:39,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:45:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:45:39,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:45:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:45:39,388 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:45:39,388 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:45:39,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:45:39,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:45:39,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:45:39,391 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:45:39,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:45:39,682 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:45:39,685 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:45:41,121 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:45:42,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:45:42,064 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:45:42,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:42 BoogieIcfgContainer [2022-11-03 02:45:42,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:45:42,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:45:42,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:45:42,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:45:42,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:45:37" (1/3) ... [2022-11-03 02:45:42,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd5e2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:42, skipping insertion in model container [2022-11-03 02:45:42,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:39" (2/3) ... [2022-11-03 02:45:42,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd5e2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:42, skipping insertion in model container [2022-11-03 02:45:42,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:42" (3/3) ... [2022-11-03 02:45:42,083 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2022-11-03 02:45:42,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:45:42,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:45:42,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:45:42,223 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;@2f15b28b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:45:42,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:45:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 02:45:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:45:42,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:42,259 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] [2022-11-03 02:45:42,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash -895696957, now seen corresponding path program 1 times [2022-11-03 02:45:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920544581] [2022-11-03 02:45:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:43,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:43,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920544581] [2022-11-03 02:45:43,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920544581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:43,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:43,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:45:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564554464] [2022-11-03 02:45:43,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:43,592 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:45:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:47,078 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2022-11-03 02:45:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:45:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2022-11-03 02:45:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:47,123 INFO L225 Difference]: With dead ends: 1159 [2022-11-03 02:45:47,123 INFO L226 Difference]: Without dead ends: 828 [2022-11-03 02:45:47,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:45:47,146 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 1623 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:47,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 2035 Invalid, 2631 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [506 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:45:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-03 02:45:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2022-11-03 02:45:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2022-11-03 02:45:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2022-11-03 02:45:47,371 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2022-11-03 02:45:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:47,376 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2022-11-03 02:45:47,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:45:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2022-11-03 02:45:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:45:47,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:47,395 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] [2022-11-03 02:45:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:45:47,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash -832320358, now seen corresponding path program 1 times [2022-11-03 02:45:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948408822] [2022-11-03 02:45:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:47,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:47,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:47,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948408822] [2022-11-03 02:45:47,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948408822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:47,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:47,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:45:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528343314] [2022-11-03 02:45:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:45:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:45:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:45:47,860 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:45:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:48,096 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2022-11-03 02:45:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:45:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2022-11-03 02:45:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:48,104 INFO L225 Difference]: With dead ends: 1309 [2022-11-03 02:45:48,104 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 02:45:48,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:45:48,109 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:48,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2177 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:48,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 02:45:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2022-11-03 02:45:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2022-11-03 02:45:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2022-11-03 02:45:48,177 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2022-11-03 02:45:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:48,177 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2022-11-03 02:45:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:45:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2022-11-03 02:45:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:45:48,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:48,182 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] [2022-11-03 02:45:48,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:45:48,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2143206914, now seen corresponding path program 1 times [2022-11-03 02:45:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909269758] [2022-11-03 02:45:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:48,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909269758] [2022-11-03 02:45:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909269758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:48,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:48,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:45:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679418450] [2022-11-03 02:45:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:45:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:45:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:48,666 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:45:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:51,346 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2022-11-03 02:45:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:45:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2022-11-03 02:45:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:51,359 INFO L225 Difference]: With dead ends: 1798 [2022-11-03 02:45:51,360 INFO L226 Difference]: Without dead ends: 1230 [2022-11-03 02:45:51,365 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 [2022-11-03 02:45:51,372 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 2176 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:51,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2319 Valid, 1642 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:45:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-11-03 02:45:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2022-11-03 02:45:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2022-11-03 02:45:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2022-11-03 02:45:51,523 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2022-11-03 02:45:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:51,524 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2022-11-03 02:45:51,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:45:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2022-11-03 02:45:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:45:51,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:51,528 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] [2022-11-03 02:45:51,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:45:51,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash 351547510, now seen corresponding path program 1 times [2022-11-03 02:45:51,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:51,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681383877] [2022-11-03 02:45:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:51,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:51,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681383877] [2022-11-03 02:45:51,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681383877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:51,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:51,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:45:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000495143] [2022-11-03 02:45:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:45:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:45:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:45:51,921 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:45:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:52,307 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2022-11-03 02:45:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:45:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-11-03 02:45:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:52,318 INFO L225 Difference]: With dead ends: 2193 [2022-11-03 02:45:52,319 INFO L226 Difference]: Without dead ends: 1136 [2022-11-03 02:45:52,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:52,337 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 221 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:52,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1939 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-03 02:45:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-11-03 02:45:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2022-11-03 02:45:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2022-11-03 02:45:52,432 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2022-11-03 02:45:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:52,432 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2022-11-03 02:45:52,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:45:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2022-11-03 02:45:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:45:52,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:52,439 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] [2022-11-03 02:45:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:45:52,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1570471703, now seen corresponding path program 1 times [2022-11-03 02:45:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725577124] [2022-11-03 02:45:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:45:52,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725577124] [2022-11-03 02:45:52,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725577124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:52,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:52,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:45:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289227538] [2022-11-03 02:45:52,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:52,910 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:45:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:55,364 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2022-11-03 02:45:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:45:55,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-11-03 02:45:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:55,381 INFO L225 Difference]: With dead ends: 2180 [2022-11-03 02:45:55,382 INFO L226 Difference]: Without dead ends: 1324 [2022-11-03 02:45:55,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:45:55,389 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 900 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:55,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 1729 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:45:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-03 02:45:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2022-11-03 02:45:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-11-03 02:45:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2022-11-03 02:45:55,485 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2022-11-03 02:45:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2022-11-03 02:45:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:45:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2022-11-03 02:45:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:45:55,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:55,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:45:55,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash -72769100, now seen corresponding path program 1 times [2022-11-03 02:45:55,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:55,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312749836] [2022-11-03 02:45:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:45:56,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312749836] [2022-11-03 02:45:56,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312749836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:56,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:56,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:45:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487426508] [2022-11-03 02:45:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:56,007 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-11-03 02:45:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:56,784 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2022-11-03 02:45:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:45:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 83 [2022-11-03 02:45:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:56,794 INFO L225 Difference]: With dead ends: 1235 [2022-11-03 02:45:56,795 INFO L226 Difference]: Without dead ends: 1220 [2022-11-03 02:45:56,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:56,797 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 603 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:56,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1680 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:45:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-03 02:45:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2022-11-03 02:45:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-11-03 02:45:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2022-11-03 02:45:56,904 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 83 [2022-11-03 02:45:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:56,905 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2022-11-03 02:45:56,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2022-11-03 02:45:56,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2022-11-03 02:45:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 02:45:56,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:56,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:56,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:45:56,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2034699635, now seen corresponding path program 1 times [2022-11-03 02:45:56,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:56,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313028583] [2022-11-03 02:45:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:45:57,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:57,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313028583] [2022-11-03 02:45:57,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313028583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:57,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:57,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:45:57,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243951614] [2022-11-03 02:45:57,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:57,322 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:45:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:57,557 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2022-11-03 02:45:57,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:45:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 85 [2022-11-03 02:45:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:57,575 INFO L225 Difference]: With dead ends: 1186 [2022-11-03 02:45:57,575 INFO L226 Difference]: Without dead ends: 1171 [2022-11-03 02:45:57,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:57,578 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 41 mSDsluCounter, 2104 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:57,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2504 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-03 02:45:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2022-11-03 02:45:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2022-11-03 02:45:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2022-11-03 02:45:57,719 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 85 [2022-11-03 02:45:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:57,721 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2022-11-03 02:45:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:45:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2022-11-03 02:45:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:45:57,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:57,727 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:45:57,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash -615279116, now seen corresponding path program 1 times [2022-11-03 02:45:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:57,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393060249] [2022-11-03 02:45:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:45:59,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:59,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393060249] [2022-11-03 02:45:59,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393060249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:59,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654498229] [2022-11-03 02:45:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:59,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:59,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:59,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:45:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:45:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:46:02,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:46:06,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654498229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023569621] [2022-11-03 02:46:06,078 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-11-03 02:46:06,079 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:06,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:06,091 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:06,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:14,004 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2022-11-03 02:47:30,734 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-03 02:47:33,646 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 82 for LOIs [2022-11-03 02:47:34,237 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-11-03 02:47:34,258 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-11-03 02:47:38,912 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 438 for LOIs [2022-11-03 02:47:39,209 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 78 for LOIs [2022-11-03 02:47:39,338 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 90 for LOIs [2022-11-03 02:47:39,363 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2022-11-03 02:47:42,426 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs [2022-11-03 02:48:47,916 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2022-11-03 02:48:48,563 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:49:10,486 WARN L234 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:25,042 WARN L234 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 688 DAG size of output: 529 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:33,833 WARN L234 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:43,133 WARN L234 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:09,907 WARN L234 SmtUtils]: Spent 25.16s on a formula simplification. DAG size of input: 821 DAG size of output: 675 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:44,153 WARN L234 SmtUtils]: Spent 32.52s on a formula simplification. DAG size of input: 973 DAG size of output: 680 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:55,424 WARN L234 SmtUtils]: Spent 11.26s on a formula simplification. DAG size of input: 506 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:09,915 WARN L234 SmtUtils]: Spent 13.04s on a formula simplification. DAG size of input: 508 DAG size of output: 475 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:24,907 WARN L234 SmtUtils]: Spent 13.46s on a formula simplification. DAG size of input: 511 DAG size of output: 478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:37,141 WARN L234 SmtUtils]: Spent 9.37s on a formula simplification. DAG size of input: 438 DAG size of output: 427 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:47,892 WARN L234 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 442 DAG size of output: 431 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:00,322 WARN L234 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 520 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:15,517 WARN L234 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 520 DAG size of output: 473 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:30,796 WARN L234 SmtUtils]: Spent 13.24s on a formula simplification. DAG size of input: 523 DAG size of output: 476 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:43,972 WARN L234 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 526 DAG size of output: 472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:53:57,256 WARN L234 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 532 DAG size of output: 478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:11,099 WARN L234 SmtUtils]: Spent 11.53s on a formula simplification. DAG size of input: 548 DAG size of output: 488 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2023569621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:11,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:11,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [11, 12, 12] total 84 [2022-11-03 02:54:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425704904] [2022-11-03 02:54:11,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:54:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:54:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=6404, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:54:11,111 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-03 02:54:21,545 WARN L234 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 636 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:31,230 WARN L234 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 648 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:38,940 WARN L234 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 736 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:46,888 WARN L234 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 599 DAG size of output: 553 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:54:54,093 WARN L234 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 611 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:55:11,204 WARN L234 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 605 DAG size of output: 593 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:55:17,644 WARN L234 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 641 DAG size of output: 616 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:56:00,872 WARN L234 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 433 DAG size of output: 430 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:56:10,278 WARN L234 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 446 DAG size of output: 443 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:57:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:51,201 INFO L93 Difference]: Finished difference Result 2968 states and 4661 transitions. [2022-11-03 02:57:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-03 02:57:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) Word has length 92 [2022-11-03 02:57:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:51,228 INFO L225 Difference]: With dead ends: 2968 [2022-11-03 02:57:51,228 INFO L226 Difference]: Without dead ends: 1824 [2022-11-03 02:57:51,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 404.9s TimeCoverageRelationStatistics Valid=710, Invalid=8410, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 02:57:51,237 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 939 mSDsluCounter, 12145 mSDsCounter, 0 mSdLazyCounter, 25484 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 12552 SdHoareTripleChecker+Invalid, 25620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 25484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 12552 Invalid, 25620 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [136 Valid, 25484 Invalid, 0 Unknown, 0 Unchecked, 137.2s Time] [2022-11-03 02:57:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-11-03 02:57:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1688. [2022-11-03 02:57:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1203 states have (on average 1.5261845386533666) internal successors, (1836), 1275 states have internal predecessors, (1836), 373 states have call successors, (373), 95 states have call predecessors, (373), 111 states have return successors, (408), 366 states have call predecessors, (408), 368 states have call successors, (408) [2022-11-03 02:57:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2617 transitions. [2022-11-03 02:57:51,868 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2617 transitions. Word has length 92 [2022-11-03 02:57:51,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:51,869 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2617 transitions. [2022-11-03 02:57:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-03 02:57:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2617 transitions. [2022-11-03 02:57:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:57:51,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:51,872 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:57:51,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:57:52,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:52,085 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:52,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1529592686, now seen corresponding path program 1 times [2022-11-03 02:57:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:57:52,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900098687] [2022-11-03 02:57:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:52,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:57:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:57:52,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:57:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900098687] [2022-11-03 02:57:52,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900098687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:52,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:57:52,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:57:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804420049] [2022-11-03 02:57:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:52,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:57:52,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:57:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:57:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:57:52,656 INFO L87 Difference]: Start difference. First operand 1688 states and 2617 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-03 02:57:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:56,049 INFO L93 Difference]: Finished difference Result 3356 states and 5334 transitions. [2022-11-03 02:57:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:57:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 94 [2022-11-03 02:57:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:56,066 INFO L225 Difference]: With dead ends: 3356 [2022-11-03 02:57:56,066 INFO L226 Difference]: Without dead ends: 2472 [2022-11-03 02:57:56,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:57:56,072 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 901 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1986 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2760 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:57:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-11-03 02:57:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2149. [2022-11-03 02:57:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 1476 states have (on average 1.5237127371273713) internal successors, (2249), 1588 states have internal predecessors, (2249), 544 states have call successors, (544), 108 states have call predecessors, (544), 128 states have return successors, (591), 536 states have call predecessors, (591), 539 states have call successors, (591) [2022-11-03 02:57:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3384 transitions. [2022-11-03 02:57:56,850 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3384 transitions. Word has length 94 [2022-11-03 02:57:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:56,851 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 3384 transitions. [2022-11-03 02:57:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-03 02:57:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3384 transitions. [2022-11-03 02:57:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 02:57:56,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:56,854 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:57:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:57:56,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -934847287, now seen corresponding path program 1 times [2022-11-03 02:57:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:57:56,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174386677] [2022-11-03 02:57:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:57:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:57:56,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:57:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174386677] [2022-11-03 02:57:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174386677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:57:56,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:57:56,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:57:56,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769536398] [2022-11-03 02:57:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:57:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:57:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:57:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:57:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:57:56,993 INFO L87 Difference]: Start difference. First operand 2149 states and 3384 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:57:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:58,511 INFO L93 Difference]: Finished difference Result 5878 states and 9355 transitions. [2022-11-03 02:57:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:57:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-11-03 02:57:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:58,536 INFO L225 Difference]: With dead ends: 5878 [2022-11-03 02:57:58,537 INFO L226 Difference]: Without dead ends: 4008 [2022-11-03 02:57:58,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:57:58,548 INFO L413 NwaCegarLoop]: 974 mSDtfsCounter, 492 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:58,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1461 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:57:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-11-03 02:58:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 4005. [2022-11-03 02:58:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 2766 states have (on average 1.5314533622559654) internal successors, (4236), 2969 states have internal predecessors, (4236), 999 states have call successors, (999), 201 states have call predecessors, (999), 239 states have return successors, (1111), 990 states have call predecessors, (1111), 994 states have call successors, (1111) [2022-11-03 02:58:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6346 transitions. [2022-11-03 02:58:00,395 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6346 transitions. Word has length 93 [2022-11-03 02:58:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:00,396 INFO L495 AbstractCegarLoop]: Abstraction has 4005 states and 6346 transitions. [2022-11-03 02:58:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:58:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6346 transitions. [2022-11-03 02:58:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 02:58:00,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:00,399 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:58:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:58:00,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1191814703, now seen corresponding path program 1 times [2022-11-03 02:58:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:58:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056672259] [2022-11-03 02:58:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:00,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:58:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:58:01,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:58:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056672259] [2022-11-03 02:58:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056672259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:58:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865861568] [2022-11-03 02:58:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:01,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:58:01,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:58:01,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:58:01,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f032c7-7239-42d8-b437-33e2e7922927/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:58:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:58:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:58:03,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:58:06,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865861568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310220960] [2022-11-03 02:58:06,523 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-03 02:58:06,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:58:06,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:58:06,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:58:06,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:58:12,175 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs