./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh --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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- 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-2329fc7 [2022-12-14 07:51:03,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:51:03,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:51:03,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:51:03,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:51:03,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:51:03,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:51:03,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:51:03,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:51:03,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:51:03,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:51:03,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:51:03,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:51:03,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:51:03,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:51:03,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:51:03,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:51:03,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:51:03,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:51:03,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:51:03,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:51:03,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:51:03,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:51:03,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:51:03,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:51:03,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:51:03,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:51:03,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:51:03,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:51:03,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:51:03,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:51:03,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:51:03,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:51:03,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:51:03,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:51:03,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:51:03,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:51:03,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:51:03,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:51:03,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:51:03,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:51:03,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:51:04,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:51:04,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:51:04,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:51:04,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:51:04,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:51:04,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:51:04,008 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:51:04,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:51:04,009 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:51:04,009 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:51:04,009 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:51:04,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:51:04,009 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:51:04,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:51:04,010 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:51:04,010 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:51:04,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:51:04,010 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:51:04,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:51:04,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:51:04,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:51:04,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:51:04,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:51:04,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:51:04,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:51:04,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:51:04,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:51:04,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:51:04,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:51:04,013 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:51:04,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:51:04,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:51:04,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:51:04,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:51:04,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:51:04,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:51:04,014 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_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2022-12-14 07:51:04,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:51:04,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:51:04,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:51:04,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:51:04,199 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:51:04,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-12-14 07:51:06,786 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:51:07,055 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:51:07,055 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-12-14 07:51:07,068 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/data/dbf83e12b/9211b583734749469b93a4ec7880d935/FLAG40186ad72 [2022-12-14 07:51:07,079 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/data/dbf83e12b/9211b583734749469b93a4ec7880d935 [2022-12-14 07:51:07,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:51:07,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:51:07,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:51:07,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:51:07,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:51:07,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7231b928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07, skipping insertion in model container [2022-12-14 07:51:07,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:51:07,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:51:07,434 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-12-14 07:51:07,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:51:07,452 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:51:07,515 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-12-14 07:51:07,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:51:07,536 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:51:07,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07 WrapperNode [2022-12-14 07:51:07,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:51:07,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:51:07,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:51:07,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:51:07,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,591 INFO L138 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 850 [2022-12-14 07:51:07,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:51:07,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:51:07,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:51:07,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:51:07,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,627 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:51:07,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:51:07,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:51:07,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:51:07,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (1/1) ... [2022-12-14 07:51:07,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:51:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:51:07,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:51:07,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:51:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 07:51:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 07:51:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:51:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 07:51:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 07:51:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 07:51:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 07:51:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 07:51:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 07:51:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 07:51:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 07:51:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 07:51:07,701 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 07:51:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 07:51:07,701 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 07:51:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 07:51:07,701 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 07:51:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 07:51:07,701 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 07:51:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 07:51:07,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 07:51:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 07:51:07,713 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 07:51:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 07:51:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 07:51:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 07:51:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 07:51:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 07:51:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 07:51:07,714 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 07:51:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 07:51:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 07:51:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 07:51:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 07:51:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 07:51:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 07:51:07,715 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 07:51:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 07:51:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 07:51:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:51:07,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:51:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 07:51:07,717 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 07:51:07,849 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:51:07,851 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:51:08,684 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:51:09,132 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:51:09,132 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:51:09,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:51:09 BoogieIcfgContainer [2022-12-14 07:51:09,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:51:09,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:51:09,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:51:09,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:51:09,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:51:07" (1/3) ... [2022-12-14 07:51:09,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dff1023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:51:09, skipping insertion in model container [2022-12-14 07:51:09,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:51:07" (2/3) ... [2022-12-14 07:51:09,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dff1023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:51:09, skipping insertion in model container [2022-12-14 07:51:09,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:51:09" (3/3) ... [2022-12-14 07:51:09,142 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2022-12-14 07:51:09,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:51:09,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:51:09,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:51:09,221 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;@944da64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:51:09,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:51:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 07:51:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 07:51:09,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:09,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:09,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -467106183, now seen corresponding path program 1 times [2022-12-14 07:51:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:09,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257983488] [2022-12-14 07:51:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:51:09,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:09,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257983488] [2022-12-14 07:51:09,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257983488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:09,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:09,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:51:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019759958] [2022-12-14 07:51:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:09,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:51:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:51:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:51:09,769 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 07:51:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:10,208 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2022-12-14 07:51:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:51:10,210 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-12-14 07:51:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:10,222 INFO L225 Difference]: With dead ends: 851 [2022-12-14 07:51:10,222 INFO L226 Difference]: Without dead ends: 490 [2022-12-14 07:51:10,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:10,230 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 282 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:10,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2344 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:51:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-14 07:51:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2022-12-14 07:51:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-12-14 07:51:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2022-12-14 07:51:10,290 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2022-12-14 07:51:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:10,291 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2022-12-14 07:51:10,291 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 07:51:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2022-12-14 07:51:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 07:51:10,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:10,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:51:10,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1277787471, now seen corresponding path program 1 times [2022-12-14 07:51:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:10,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355984703] [2022-12-14 07:51:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:10,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:10,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355984703] [2022-12-14 07:51:10,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355984703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:10,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:10,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 07:51:10,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878489220] [2022-12-14 07:51:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:51:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:51:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:51:10,605 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 07:51:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:12,728 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2022-12-14 07:51:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:51:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2022-12-14 07:51:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:12,735 INFO L225 Difference]: With dead ends: 1287 [2022-12-14 07:51:12,735 INFO L226 Difference]: Without dead ends: 930 [2022-12-14 07:51:12,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:51:12,737 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1740 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 4563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:12,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1806 Valid, 2530 Invalid, 4563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3968 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:51:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-12-14 07:51:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2022-12-14 07:51:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2022-12-14 07:51:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2022-12-14 07:51:12,788 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2022-12-14 07:51:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:12,789 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2022-12-14 07:51:12,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 07:51:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2022-12-14 07:51:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 07:51:12,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:12,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:12,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:51:12,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1144691275, now seen corresponding path program 1 times [2022-12-14 07:51:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:12,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337622249] [2022-12-14 07:51:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:13,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:13,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337622249] [2022-12-14 07:51:13,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337622249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:13,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:13,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:51:13,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046388199] [2022-12-14 07:51:13,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:51:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:51:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:13,878 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 07:51:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:16,534 INFO L93 Difference]: Finished difference Result 3563 states and 5803 transitions. [2022-12-14 07:51:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:51:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2022-12-14 07:51:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:16,545 INFO L225 Difference]: With dead ends: 3563 [2022-12-14 07:51:16,545 INFO L226 Difference]: Without dead ends: 2713 [2022-12-14 07:51:16,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:51:16,549 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 2565 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:16,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2637 Valid, 1432 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 07:51:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-12-14 07:51:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2509. [2022-12-14 07:51:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1797 states have (on average 1.595436839176405) internal successors, (2867), 1888 states have internal predecessors, (2867), 566 states have call successors, (566), 129 states have call predecessors, (566), 145 states have return successors, (617), 552 states have call predecessors, (617), 561 states have call successors, (617) [2022-12-14 07:51:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 4050 transitions. [2022-12-14 07:51:16,701 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 4050 transitions. Word has length 84 [2022-12-14 07:51:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:16,701 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 4050 transitions. [2022-12-14 07:51:16,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 07:51:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 4050 transitions. [2022-12-14 07:51:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 07:51:16,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:16,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:16,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:51:16,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -858706208, now seen corresponding path program 1 times [2022-12-14 07:51:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:16,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110716586] [2022-12-14 07:51:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:16,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110716586] [2022-12-14 07:51:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110716586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:16,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:16,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:51:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870299922] [2022-12-14 07:51:16,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:51:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:51:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:16,877 INFO L87 Difference]: Start difference. First operand 2509 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:51:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:17,167 INFO L93 Difference]: Finished difference Result 4310 states and 6968 transitions. [2022-12-14 07:51:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:51:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-12-14 07:51:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:17,179 INFO L225 Difference]: With dead ends: 4310 [2022-12-14 07:51:17,179 INFO L226 Difference]: Without dead ends: 2776 [2022-12-14 07:51:17,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:17,186 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:17,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3552 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:51:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2022-12-14 07:51:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2582. [2022-12-14 07:51:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2582 states, 1848 states have (on average 1.579004329004329) internal successors, (2918), 1941 states have internal predecessors, (2918), 566 states have call successors, (566), 129 states have call predecessors, (566), 167 states have return successors, (664), 572 states have call predecessors, (664), 561 states have call successors, (664) [2022-12-14 07:51:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 4148 transitions. [2022-12-14 07:51:17,378 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 4148 transitions. Word has length 83 [2022-12-14 07:51:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:17,378 INFO L495 AbstractCegarLoop]: Abstraction has 2582 states and 4148 transitions. [2022-12-14 07:51:17,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:51:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 4148 transitions. [2022-12-14 07:51:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 07:51:17,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:17,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:51:17,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1027250133, now seen corresponding path program 1 times [2022-12-14 07:51:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910339133] [2022-12-14 07:51:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:17,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910339133] [2022-12-14 07:51:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910339133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:17,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:17,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:51:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012894500] [2022-12-14 07:51:17,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:51:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:51:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:17,579 INFO L87 Difference]: Start difference. First operand 2582 states and 4148 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:51:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:17,882 INFO L93 Difference]: Finished difference Result 4408 states and 7091 transitions. [2022-12-14 07:51:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:51:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-12-14 07:51:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:17,893 INFO L225 Difference]: With dead ends: 4408 [2022-12-14 07:51:17,894 INFO L226 Difference]: Without dead ends: 2827 [2022-12-14 07:51:17,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:17,900 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:17,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3552 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:51:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-12-14 07:51:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2593. [2022-12-14 07:51:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 1859 states have (on average 1.5755782678859602) internal successors, (2929), 1941 states have internal predecessors, (2929), 566 states have call successors, (566), 129 states have call predecessors, (566), 167 states have return successors, (664), 583 states have call predecessors, (664), 561 states have call successors, (664) [2022-12-14 07:51:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4159 transitions. [2022-12-14 07:51:18,052 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4159 transitions. Word has length 84 [2022-12-14 07:51:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:18,053 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 4159 transitions. [2022-12-14 07:51:18,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:51:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4159 transitions. [2022-12-14 07:51:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 07:51:18,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:18,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:51:18,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1892411206, now seen corresponding path program 1 times [2022-12-14 07:51:18,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:18,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592477375] [2022-12-14 07:51:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:18,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:18,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592477375] [2022-12-14 07:51:18,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592477375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:18,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:18,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:51:18,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649072840] [2022-12-14 07:51:18,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:18,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:51:18,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:51:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:51:18,258 INFO L87 Difference]: Start difference. First operand 2593 states and 4159 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 07:51:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:20,183 INFO L93 Difference]: Finished difference Result 5893 states and 9512 transitions. [2022-12-14 07:51:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:51:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 90 [2022-12-14 07:51:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:20,199 INFO L225 Difference]: With dead ends: 5893 [2022-12-14 07:51:20,199 INFO L226 Difference]: Without dead ends: 3945 [2022-12-14 07:51:20,206 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 [2022-12-14 07:51:20,207 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 2044 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:20,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2208 Valid, 1416 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:51:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2022-12-14 07:51:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3769. [2022-12-14 07:51:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 2655 states have (on average 1.5340866290018833) internal successors, (4073), 2786 states have internal predecessors, (4073), 850 states have call successors, (850), 211 states have call predecessors, (850), 263 states have return successors, (1018), 862 states have call predecessors, (1018), 845 states have call successors, (1018) [2022-12-14 07:51:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 5941 transitions. [2022-12-14 07:51:20,454 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 5941 transitions. Word has length 90 [2022-12-14 07:51:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:20,454 INFO L495 AbstractCegarLoop]: Abstraction has 3769 states and 5941 transitions. [2022-12-14 07:51:20,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 07:51:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 5941 transitions. [2022-12-14 07:51:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 07:51:20,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:20,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:51:20,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -468701615, now seen corresponding path program 1 times [2022-12-14 07:51:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:20,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122847597] [2022-12-14 07:51:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:20,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122847597] [2022-12-14 07:51:20,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122847597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:20,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:20,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:51:20,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47474374] [2022-12-14 07:51:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:20,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:51:20,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:51:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:51:20,660 INFO L87 Difference]: Start difference. First operand 3769 states and 5941 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 07:51:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:21,954 INFO L93 Difference]: Finished difference Result 7172 states and 11370 transitions. [2022-12-14 07:51:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:51:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2022-12-14 07:51:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:21,971 INFO L225 Difference]: With dead ends: 7172 [2022-12-14 07:51:21,971 INFO L226 Difference]: Without dead ends: 4275 [2022-12-14 07:51:21,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:51:21,982 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 998 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1612 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:51:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2022-12-14 07:51:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3850. [2022-12-14 07:51:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 2709 states have (on average 1.5278700627537838) internal successors, (4139), 2852 states have internal predecessors, (4139), 853 states have call successors, (853), 226 states have call predecessors, (853), 287 states have return successors, (1052), 862 states have call predecessors, (1052), 848 states have call successors, (1052) [2022-12-14 07:51:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 6044 transitions. [2022-12-14 07:51:22,247 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 6044 transitions. Word has length 92 [2022-12-14 07:51:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:22,247 INFO L495 AbstractCegarLoop]: Abstraction has 3850 states and 6044 transitions. [2022-12-14 07:51:22,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 07:51:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 6044 transitions. [2022-12-14 07:51:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 07:51:22,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:22,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:51:22,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash 896202397, now seen corresponding path program 1 times [2022-12-14 07:51:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484101938] [2022-12-14 07:51:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:51:22,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:22,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484101938] [2022-12-14 07:51:22,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484101938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:22,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:22,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:51:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294156699] [2022-12-14 07:51:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:51:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:51:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:51:22,417 INFO L87 Difference]: Start difference. First operand 3850 states and 6044 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:51:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:23,006 INFO L93 Difference]: Finished difference Result 3954 states and 6206 transitions. [2022-12-14 07:51:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:51:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-12-14 07:51:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:23,026 INFO L225 Difference]: With dead ends: 3954 [2022-12-14 07:51:23,026 INFO L226 Difference]: Without dead ends: 3939 [2022-12-14 07:51:23,028 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 [2022-12-14 07:51:23,029 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:23,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1471 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:51:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2022-12-14 07:51:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3856. [2022-12-14 07:51:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 2715 states have (on average 1.5267034990791897) internal successors, (4145), 2858 states have internal predecessors, (4145), 853 states have call successors, (853), 226 states have call predecessors, (853), 287 states have return successors, (1052), 862 states have call predecessors, (1052), 848 states have call successors, (1052) [2022-12-14 07:51:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 6050 transitions. [2022-12-14 07:51:23,354 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 6050 transitions. Word has length 97 [2022-12-14 07:51:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:23,354 INFO L495 AbstractCegarLoop]: Abstraction has 3856 states and 6050 transitions. [2022-12-14 07:51:23,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:51:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 6050 transitions. [2022-12-14 07:51:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 07:51:23,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:23,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:23,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:51:23,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:23,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1889378199, now seen corresponding path program 1 times [2022-12-14 07:51:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:23,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337332108] [2022-12-14 07:51:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:23,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:51:23,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:23,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337332108] [2022-12-14 07:51:23,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337332108] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:23,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:23,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 07:51:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377397798] [2022-12-14 07:51:23,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:51:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:23,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:51:23,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:51:23,556 INFO L87 Difference]: Start difference. First operand 3856 states and 6050 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 07:51:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:24,106 INFO L93 Difference]: Finished difference Result 7277 states and 11578 transitions. [2022-12-14 07:51:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:51:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2022-12-14 07:51:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:24,120 INFO L225 Difference]: With dead ends: 7277 [2022-12-14 07:51:24,120 INFO L226 Difference]: Without dead ends: 4070 [2022-12-14 07:51:24,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:51:24,130 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 359 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 4054 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:24,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 4054 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:51:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2022-12-14 07:51:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 4056. [2022-12-14 07:51:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 2901 states have (on average 1.5046535677352637) internal successors, (4365), 3048 states have internal predecessors, (4365), 858 states have call successors, (858), 231 states have call predecessors, (858), 296 states have return successors, (1053), 867 states have call predecessors, (1053), 853 states have call successors, (1053) [2022-12-14 07:51:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 6276 transitions. [2022-12-14 07:51:24,365 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 6276 transitions. Word has length 101 [2022-12-14 07:51:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:24,365 INFO L495 AbstractCegarLoop]: Abstraction has 4056 states and 6276 transitions. [2022-12-14 07:51:24,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 07:51:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 6276 transitions. [2022-12-14 07:51:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 07:51:24,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:24,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:24,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:51:24,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash 289581871, now seen corresponding path program 1 times [2022-12-14 07:51:24,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996207493] [2022-12-14 07:51:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:24,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:51:24,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:24,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996207493] [2022-12-14 07:51:24,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996207493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:51:24,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:51:24,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:51:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349805332] [2022-12-14 07:51:24,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:51:24,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:51:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:51:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:51:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:51:24,669 INFO L87 Difference]: Start difference. First operand 4056 states and 6276 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 07:51:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:28,021 INFO L93 Difference]: Finished difference Result 14787 states and 23254 transitions. [2022-12-14 07:51:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:51:28,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2022-12-14 07:51:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:28,065 INFO L225 Difference]: With dead ends: 14787 [2022-12-14 07:51:28,066 INFO L226 Difference]: Without dead ends: 10754 [2022-12-14 07:51:28,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:51:28,075 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 2576 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2640 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:28,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2640 Valid, 1471 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 3672 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:51:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10754 states. [2022-12-14 07:51:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10754 to 9501. [2022-12-14 07:51:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9501 states, 6747 states have (on average 1.5148955091151624) internal successors, (10221), 7120 states have internal predecessors, (10221), 2113 states have call successors, (2113), 497 states have call predecessors, (2113), 640 states have return successors, (2544), 2020 states have call predecessors, (2544), 2108 states have call successors, (2544) [2022-12-14 07:51:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9501 states to 9501 states and 14878 transitions. [2022-12-14 07:51:28,808 INFO L78 Accepts]: Start accepts. Automaton has 9501 states and 14878 transitions. Word has length 109 [2022-12-14 07:51:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:28,808 INFO L495 AbstractCegarLoop]: Abstraction has 9501 states and 14878 transitions. [2022-12-14 07:51:28,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 07:51:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9501 states and 14878 transitions. [2022-12-14 07:51:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 07:51:28,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:28,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:28,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:51:28,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:51:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -468530039, now seen corresponding path program 1 times [2022-12-14 07:51:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:51:28,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94565891] [2022-12-14 07:51:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:28,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:51:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:51:30,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:51:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94565891] [2022-12-14 07:51:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94565891] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:51:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729553099] [2022-12-14 07:51:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:51:30,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:51:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:51:30,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:51:30,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17efe97b-147c-49fc-be08-129541480555/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:51:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:51:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:51:32,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:51:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729553099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:51:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130105084] [2022-12-14 07:51:33,859 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-12-14 07:51:33,859 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:51:33,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:51:33,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:51:33,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:51:39,819 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-12-14 07:52:36,675 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-12-14 07:52:43,168 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-12-14 07:52:43,223 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-12-14 07:52:43,237 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-12-14 07:52:43,252 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 108 for LOIs [2022-12-14 07:52:43,263 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-12-14 07:52:46,702 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 471 for LOIs [2022-12-14 07:52:46,978 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 104 for LOIs [2022-12-14 07:52:47,268 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 99 for LOIs [2022-12-14 07:52:47,279 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-12-14 07:52:49,729 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs