./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:19:25,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:19:25,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:19:26,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:19:26,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:19:26,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:19:26,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:19:26,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:19:26,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:19:26,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:19:26,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:19:26,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:19:26,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:19:26,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:19:26,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:19:26,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:19:26,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:19:26,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:19:26,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:19:26,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:19:26,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:19:26,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:19:26,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:19:26,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:19:26,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:19:26,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:19:26,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:19:26,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:19:26,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:19:26,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:19:26,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:19:26,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:19:26,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:19:26,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:19:26,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:19:26,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:19:26,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:19:26,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:19:26,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:19:26,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:19:26,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:19:26,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:19:26,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:19:26,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:19:26,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:19:26,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:19:26,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:19:26,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:19:26,121 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:19:26,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:19:26,121 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:19:26,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:19:26,125 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:19:26,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:19:26,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:19:26,126 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:19:26,126 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:19:26,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:19:26,127 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:19:26,127 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:19:26,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:19:26,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:19:26,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:19:26,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:19:26,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:19:26,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:19:26,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:19:26,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:19:26,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:19:26,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:19:26,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:19:26,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:19:26,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:19:26,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:19:26,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:19:26,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:19:26,132 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:19:26,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:19:26,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:19:26,133 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:19:26,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:19:26,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:19:26,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:19:26,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2022-11-23 15:19:26,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:19:26,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:19:26,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:19:26,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:19:26,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:19:26,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-23 15:19:29,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:19:29,875 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:19:29,875 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-11-23 15:19:29,904 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/data/987dc580e/39085ad56ba046929b19f65abcc5e467/FLAG3b5327a27 [2022-11-23 15:19:29,918 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/data/987dc580e/39085ad56ba046929b19f65abcc5e467 [2022-11-23 15:19:29,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:19:29,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:19:29,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:19:29,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:19:29,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:19:29,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:19:29" (1/1) ... [2022-11-23 15:19:29,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5724899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:29, skipping insertion in model container [2022-11-23 15:19:29,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:19:29" (1/1) ... [2022-11-23 15:19:29,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:19:30,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:19:30,535 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_d24a825d-a4ea-4090-bf15-72a23a80e6c3/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-23 15:19:30,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:19:30,649 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:19:30,715 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_d24a825d-a4ea-4090-bf15-72a23a80e6c3/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-11-23 15:19:30,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:19:30,784 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:19:30,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30 WrapperNode [2022-11-23 15:19:30,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:19:30,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:19:30,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:19:30,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:19:30,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,866 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2022-11-23 15:19:30,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:19:30,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:19:30,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:19:30,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:19:30,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,965 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:30,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:19:30,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:19:30,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:19:31,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:19:31,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (1/1) ... [2022-11-23 15:19:31,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:19:31,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:31,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:19:31,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:19:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:19:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 15:19:31,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 15:19:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:19:31,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:19:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:19:31,089 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:19:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:19:31,089 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:19:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 15:19:31,089 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 15:19:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:19:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:19:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:19:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:19:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:19:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:19:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:19:31,091 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:19:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:19:31,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:19:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:19:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:19:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:19:31,093 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:19:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:19:31,094 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:19:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:19:31,094 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:19:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-23 15:19:31,094 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-23 15:19:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:19:31,095 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:19:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:19:31,095 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:19:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-23 15:19:31,096 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-23 15:19:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:19:31,096 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:19:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:19:31,096 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:19:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:19:31,097 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:19:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:19:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:19:31,097 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:19:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:19:31,098 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:19:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:19:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:19:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:19:31,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:19:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:19:31,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:19:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:19:31,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:19:31,296 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:19:31,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:19:32,613 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:19:33,532 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:19:33,532 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:19:33,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:33 BoogieIcfgContainer [2022-11-23 15:19:33,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:19:33,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:19:33,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:19:33,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:19:33,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:19:29" (1/3) ... [2022-11-23 15:19:33,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4256497d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:33, skipping insertion in model container [2022-11-23 15:19:33,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:30" (2/3) ... [2022-11-23 15:19:33,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4256497d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:33, skipping insertion in model container [2022-11-23 15:19:33,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:33" (3/3) ... [2022-11-23 15:19:33,552 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2022-11-23 15:19:33,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:19:33,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:19:33,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:19:33,667 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;@6c06d471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:19:33,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:19:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-23 15:19:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 15:19:33,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:33,708 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:33,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -414763503, now seen corresponding path program 1 times [2022-11-23 15:19:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380895965] [2022-11-23 15:19:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:19:34,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380895965] [2022-11-23 15:19:34,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380895965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:34,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:34,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:19:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514345137] [2022-11-23 15:19:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:19:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:19:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:34,844 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 15:19:36,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:36,087 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-11-23 15:19:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:19:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-11-23 15:19:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:36,117 INFO L225 Difference]: With dead ends: 1150 [2022-11-23 15:19:36,119 INFO L226 Difference]: Without dead ends: 748 [2022-11-23 15:19:36,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:36,138 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 546 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:36,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2990 Invalid, 927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [158 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:19:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-23 15:19:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-11-23 15:19:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-11-23 15:19:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-11-23 15:19:36,298 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-11-23 15:19:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:36,304 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-11-23 15:19:36,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-23 15:19:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-11-23 15:19:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 15:19:36,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:36,312 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:36,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:19:36,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash -415147964, now seen corresponding path program 1 times [2022-11-23 15:19:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:36,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574855429] [2022-11-23 15:19:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:19:36,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:36,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574855429] [2022-11-23 15:19:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574855429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:36,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:19:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:19:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173606760] [2022-11-23 15:19:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:36,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:19:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:19:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:19:36,902 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:19:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:38,073 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-11-23 15:19:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:19:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2022-11-23 15:19:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:38,087 INFO L225 Difference]: With dead ends: 2669 [2022-11-23 15:19:38,088 INFO L226 Difference]: Without dead ends: 1941 [2022-11-23 15:19:38,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:19:38,096 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 849 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 4034 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:38,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 4034 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:19:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-23 15:19:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-11-23 15:19:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-11-23 15:19:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-11-23 15:19:38,234 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2022-11-23 15:19:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:38,235 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-11-23 15:19:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 15:19:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-11-23 15:19:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:19:38,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:38,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:19:38,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1728178894, now seen corresponding path program 1 times [2022-11-23 15:19:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:38,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161246719] [2022-11-23 15:19:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:38,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:38,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:38,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161246719] [2022-11-23 15:19:38,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161246719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:38,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471092161] [2022-11-23 15:19:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:38,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:19:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:39,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:39,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471092161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:39,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:39,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:19:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488748061] [2022-11-23 15:19:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:19:39,151 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:19:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:39,498 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-11-23 15:19:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-11-23 15:19:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:39,516 INFO L225 Difference]: With dead ends: 3959 [2022-11-23 15:19:39,516 INFO L226 Difference]: Without dead ends: 2584 [2022-11-23 15:19:39,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:19:39,529 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:39,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:19:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-11-23 15:19:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-11-23 15:19:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-11-23 15:19:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-11-23 15:19:39,726 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2022-11-23 15:19:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:39,727 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-11-23 15:19:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:19:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-11-23 15:19:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 15:19:39,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:39,730 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:39,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:39,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1342972250, now seen corresponding path program 1 times [2022-11-23 15:19:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607239496] [2022-11-23 15:19:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:19:40,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:40,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607239496] [2022-11-23 15:19:40,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607239496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:40,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457822941] [2022-11-23 15:19:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:40,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:40,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:40,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:40,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:19:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:19:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:19:40,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:40,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457822941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:40,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:40,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:19:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565014076] [2022-11-23 15:19:40,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:40,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:19:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:19:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:19:40,808 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:19:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:41,175 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-11-23 15:19:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:19:41,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-11-23 15:19:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:41,204 INFO L225 Difference]: With dead ends: 5622 [2022-11-23 15:19:41,204 INFO L226 Difference]: Without dead ends: 3125 [2022-11-23 15:19:41,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:19:41,228 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 559 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:41,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:19:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-11-23 15:19:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-11-23 15:19:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-11-23 15:19:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-11-23 15:19:41,471 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-11-23 15:19:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-11-23 15:19:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:19:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-11-23 15:19:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 15:19:41,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:41,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:41,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:19:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:41,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 993443125, now seen corresponding path program 1 times [2022-11-23 15:19:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729291555] [2022-11-23 15:19:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:19:42,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729291555] [2022-11-23 15:19:42,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729291555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441937674] [2022-11-23 15:19:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:42,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:42,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:42,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:42,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:19:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:19:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:19:42,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:42,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441937674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:42,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:42,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-23 15:19:42,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31661227] [2022-11-23 15:19:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:42,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:19:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:19:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:19:42,910 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:19:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:43,501 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-11-23 15:19:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:19:43,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-11-23 15:19:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:43,530 INFO L225 Difference]: With dead ends: 6167 [2022-11-23 15:19:43,530 INFO L226 Difference]: Without dead ends: 3902 [2022-11-23 15:19:43,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:19:43,549 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:43,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:19:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-11-23 15:19:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-11-23 15:19:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-11-23 15:19:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-11-23 15:19:43,833 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 86 [2022-11-23 15:19:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:43,834 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-11-23 15:19:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:19:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-11-23 15:19:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:19:43,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:43,839 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:43,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:44,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1702584009, now seen corresponding path program 1 times [2022-11-23 15:19:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908314313] [2022-11-23 15:19:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:19:44,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908314313] [2022-11-23 15:19:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908314313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715828524] [2022-11-23 15:19:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:44,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:44,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:44,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:19:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:19:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:19:45,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:45,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715828524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:45,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:45,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-23 15:19:45,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838973119] [2022-11-23 15:19:45,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:45,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:19:45,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:19:45,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:19:45,499 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:19:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:46,620 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-11-23 15:19:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:19:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2022-11-23 15:19:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:46,643 INFO L225 Difference]: With dead ends: 5778 [2022-11-23 15:19:46,644 INFO L226 Difference]: Without dead ends: 3325 [2022-11-23 15:19:46,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:19:46,662 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 498 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:46,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 3184 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:19:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-11-23 15:19:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-11-23 15:19:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-11-23 15:19:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-11-23 15:19:46,913 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 88 [2022-11-23 15:19:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:46,914 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-11-23 15:19:46,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:19:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-11-23 15:19:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 15:19:46,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:46,918 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:46,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:47,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash 896215998, now seen corresponding path program 1 times [2022-11-23 15:19:47,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:47,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125214775] [2022-11-23 15:19:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:19:47,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125214775] [2022-11-23 15:19:47,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125214775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741344900] [2022-11-23 15:19:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:47,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:47,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:47,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:19:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:19:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:19:48,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:48,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741344900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:48,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:48,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-23 15:19:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828020513] [2022-11-23 15:19:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:19:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:19:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:19:48,214 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:19:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:48,692 INFO L93 Difference]: Finished difference Result 6163 states and 9951 transitions. [2022-11-23 15:19:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:19:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-11-23 15:19:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:48,721 INFO L225 Difference]: With dead ends: 6163 [2022-11-23 15:19:48,721 INFO L226 Difference]: Without dead ends: 3674 [2022-11-23 15:19:48,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:19:48,745 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 219 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:48,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1594 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:19:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-11-23 15:19:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2022-11-23 15:19:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2637 states have (on average 1.5297686765263556) internal successors, (4034), 2809 states have internal predecessors, (4034), 814 states have call successors, (814), 200 states have call predecessors, (814), 222 states have return successors, (971), 778 states have call predecessors, (971), 808 states have call successors, (971) [2022-11-23 15:19:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5819 transitions. [2022-11-23 15:19:49,047 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5819 transitions. Word has length 92 [2022-11-23 15:19:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:49,048 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5819 transitions. [2022-11-23 15:19:49,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:19:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5819 transitions. [2022-11-23 15:19:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 15:19:49,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:49,053 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:19:49,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:49,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:19:49,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -141184640, now seen corresponding path program 1 times [2022-11-23 15:19:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615260407] [2022-11-23 15:19:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:19:49,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615260407] [2022-11-23 15:19:49,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615260407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419239791] [2022-11-23 15:19:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:49,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:49,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:19:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:19:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:19:50,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:19:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:19:50,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419239791] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:50,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:19:50,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-23 15:19:50,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405657250] [2022-11-23 15:19:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:50,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:19:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:19:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:19:50,957 INFO L87 Difference]: Start difference. First operand 3674 states and 5819 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:19:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:55,255 INFO L93 Difference]: Finished difference Result 9688 states and 16293 transitions. [2022-11-23 15:19:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:19:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-11-23 15:19:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:55,363 INFO L225 Difference]: With dead ends: 9688 [2022-11-23 15:19:55,364 INFO L226 Difference]: Without dead ends: 7335 [2022-11-23 15:19:55,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:19:55,385 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 2599 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:55,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 3108 Invalid, 3944 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1232 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-23 15:19:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-11-23 15:19:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6840. [2022-11-23 15:19:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1996), 1292 states have call predecessors, (1996), 1337 states have call successors, (1996) [2022-11-23 15:19:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11139 transitions. [2022-11-23 15:19:55,983 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11139 transitions. Word has length 92 [2022-11-23 15:19:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:55,983 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11139 transitions. [2022-11-23 15:19:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:19:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11139 transitions. [2022-11-23 15:19:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 15:19:55,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:55,987 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 15:19:56,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:56,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 657145104, now seen corresponding path program 1 times [2022-11-23 15:19:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:56,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146370372] [2022-11-23 15:19:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:19:56,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:19:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146370372] [2022-11-23 15:19:56,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146370372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:19:56,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972830621] [2022-11-23 15:19:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:56,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:19:56,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:19:56,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:19:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:19:57,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:19:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:19:57,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:19:57,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972830621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:19:57,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:19:57,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-23 15:19:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585748188] [2022-11-23 15:19:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:19:57,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:19:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:19:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:19:57,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:19:57,398 INFO L87 Difference]: Start difference. First operand 6840 states and 11139 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:19:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:19:58,610 INFO L93 Difference]: Finished difference Result 12375 states and 20284 transitions. [2022-11-23 15:19:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:19:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-11-23 15:19:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:19:58,683 INFO L225 Difference]: With dead ends: 12375 [2022-11-23 15:19:58,683 INFO L226 Difference]: Without dead ends: 6856 [2022-11-23 15:19:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:19:58,718 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 419 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:19:58,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:19:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2022-11-23 15:19:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6840. [2022-11-23 15:19:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1988), 1292 states have call predecessors, (1988), 1337 states have call successors, (1988) [2022-11-23 15:19:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11131 transitions. [2022-11-23 15:19:59,333 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11131 transitions. Word has length 96 [2022-11-23 15:19:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:19:59,334 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11131 transitions. [2022-11-23 15:19:59,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:19:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11131 transitions. [2022-11-23 15:19:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:19:59,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:19:59,342 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 15:19:59,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:19:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:19:59,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:19:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:19:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1154205739, now seen corresponding path program 1 times [2022-11-23 15:19:59,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:19:59,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780677749] [2022-11-23 15:19:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:19:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:19:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:20:00,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780677749] [2022-11-23 15:20:00,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780677749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935082276] [2022-11-23 15:20:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:00,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:00,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:00,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:20:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:20:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:20:00,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:00,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935082276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:00,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:00,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-23 15:20:00,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824484671] [2022-11-23 15:20:00,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:20:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:20:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:00,704 INFO L87 Difference]: Start difference. First operand 6840 states and 11131 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:20:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:01,433 INFO L93 Difference]: Finished difference Result 13215 states and 22058 transitions. [2022-11-23 15:20:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:20:01,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 121 [2022-11-23 15:20:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:01,483 INFO L225 Difference]: With dead ends: 13215 [2022-11-23 15:20:01,483 INFO L226 Difference]: Without dead ends: 7220 [2022-11-23 15:20:01,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:01,521 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:01,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3614 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:20:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2022-11-23 15:20:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 7068. [2022-11-23 15:20:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 5193 states have (on average 1.5293664548430579) internal successors, (7942), 5497 states have internal predecessors, (7942), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1336 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-11-23 15:20:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 11740 transitions. [2022-11-23 15:20:02,140 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 11740 transitions. Word has length 121 [2022-11-23 15:20:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:02,141 INFO L495 AbstractCegarLoop]: Abstraction has 7068 states and 11740 transitions. [2022-11-23 15:20:02,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:20:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 11740 transitions. [2022-11-23 15:20:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 15:20:02,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:02,146 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-23 15:20:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:02,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:20:02,355 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash -584114713, now seen corresponding path program 1 times [2022-11-23 15:20:02,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802881048] [2022-11-23 15:20:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:20:02,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:02,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802881048] [2022-11-23 15:20:02,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802881048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:02,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731871232] [2022-11-23 15:20:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:02,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:02,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:02,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:20:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:03,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:20:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:20:03,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:03,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731871232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:03,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:03,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-23 15:20:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444935583] [2022-11-23 15:20:03,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:03,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:20:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:20:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:03,365 INFO L87 Difference]: Start difference. First operand 7068 states and 11740 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:20:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:04,169 INFO L93 Difference]: Finished difference Result 13551 states and 22861 transitions. [2022-11-23 15:20:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:20:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2022-11-23 15:20:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:04,233 INFO L225 Difference]: With dead ends: 13551 [2022-11-23 15:20:04,233 INFO L226 Difference]: Without dead ends: 7336 [2022-11-23 15:20:04,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:04,285 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 13 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3652 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:04,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3652 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:20:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-11-23 15:20:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7096. [2022-11-23 15:20:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5221 states have (on average 1.5265274851561004) internal successors, (7970), 5497 states have internal predecessors, (7970), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1364 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-11-23 15:20:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 11768 transitions. [2022-11-23 15:20:04,870 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 11768 transitions. Word has length 122 [2022-11-23 15:20:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:04,870 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 11768 transitions. [2022-11-23 15:20:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-23 15:20:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 11768 transitions. [2022-11-23 15:20:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:20:04,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:04,879 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:04,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:05,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:20:05,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1110943576, now seen corresponding path program 1 times [2022-11-23 15:20:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928818405] [2022-11-23 15:20:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:20:05,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:05,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928818405] [2022-11-23 15:20:05,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928818405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386841348] [2022-11-23 15:20:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:05,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:05,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:05,791 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:05,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:20:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:20:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:20:06,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:06,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386841348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:06,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:06,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-23 15:20:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147198895] [2022-11-23 15:20:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:06,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:20:06,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:20:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:20:06,208 INFO L87 Difference]: Start difference. First operand 7096 states and 11768 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:06,702 INFO L93 Difference]: Finished difference Result 14754 states and 25979 transitions. [2022-11-23 15:20:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:20:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 124 [2022-11-23 15:20:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:06,767 INFO L225 Difference]: With dead ends: 14754 [2022-11-23 15:20:06,767 INFO L226 Difference]: Without dead ends: 8491 [2022-11-23 15:20:06,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:20:06,825 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 71 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:06,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1224 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:20:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2022-11-23 15:20:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8026. [2022-11-23 15:20:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 6064 states have (on average 1.524571240105541) internal successors, (9245), 6340 states have internal predecessors, (9245), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1451 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-11-23 15:20:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13217 transitions. [2022-11-23 15:20:07,484 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13217 transitions. Word has length 124 [2022-11-23 15:20:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:07,485 INFO L495 AbstractCegarLoop]: Abstraction has 8026 states and 13217 transitions. [2022-11-23 15:20:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13217 transitions. [2022-11-23 15:20:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:20:07,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:07,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:07,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:07,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1543861631, now seen corresponding path program 1 times [2022-11-23 15:20:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2663365] [2022-11-23 15:20:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:20:08,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2663365] [2022-11-23 15:20:08,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2663365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123364606] [2022-11-23 15:20:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:08,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:08,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:08,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:20:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:20:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:20:08,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:08,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123364606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:08,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:08,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-23 15:20:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252380033] [2022-11-23 15:20:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:08,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:20:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:20:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:08,757 INFO L87 Difference]: Start difference. First operand 8026 states and 13217 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:09,451 INFO L93 Difference]: Finished difference Result 15467 states and 25815 transitions. [2022-11-23 15:20:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:20:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 125 [2022-11-23 15:20:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:09,512 INFO L225 Difference]: With dead ends: 15467 [2022-11-23 15:20:09,512 INFO L226 Difference]: Without dead ends: 8294 [2022-11-23 15:20:09,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:20:09,557 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 13 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:09,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3603 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:20:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2022-11-23 15:20:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 8054. [2022-11-23 15:20:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 6092 states have (on average 1.5221602101116218) internal successors, (9273), 6340 states have internal predecessors, (9273), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1479 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-11-23 15:20:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 13245 transitions. [2022-11-23 15:20:10,194 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 13245 transitions. Word has length 125 [2022-11-23 15:20:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:10,194 INFO L495 AbstractCegarLoop]: Abstraction has 8054 states and 13245 transitions. [2022-11-23 15:20:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 13245 transitions. [2022-11-23 15:20:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-23 15:20:10,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:10,205 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:10,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:10,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:10,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash -501436400, now seen corresponding path program 1 times [2022-11-23 15:20:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:10,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212555988] [2022-11-23 15:20:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:20:11,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212555988] [2022-11-23 15:20:11,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212555988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795302983] [2022-11-23 15:20:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:11,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:11,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:20:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:20:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:20:11,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:11,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795302983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:11,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:11,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-23 15:20:11,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400553591] [2022-11-23 15:20:11,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:11,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:20:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:20:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:20:11,657 INFO L87 Difference]: Start difference. First operand 8054 states and 13245 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:20:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:12,357 INFO L93 Difference]: Finished difference Result 15943 states and 26698 transitions. [2022-11-23 15:20:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:20:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 132 [2022-11-23 15:20:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:12,410 INFO L225 Difference]: With dead ends: 15943 [2022-11-23 15:20:12,410 INFO L226 Difference]: Without dead ends: 6778 [2022-11-23 15:20:12,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:20:12,461 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 220 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:12,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2870 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:20:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2022-11-23 15:20:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6778. [2022-11-23 15:20:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 4954 states have (on average 1.4745660072668552) internal successors, (7305), 5200 states have internal predecessors, (7305), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 511 states have return successors, (2384), 1349 states have call predecessors, (2384), 1304 states have call successors, (2384) [2022-11-23 15:20:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 11001 transitions. [2022-11-23 15:20:13,077 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 11001 transitions. Word has length 132 [2022-11-23 15:20:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:13,077 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 11001 transitions. [2022-11-23 15:20:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:20:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 11001 transitions. [2022-11-23 15:20:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:20:13,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:13,088 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:13,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:13,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:20:13,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2106601047, now seen corresponding path program 1 times [2022-11-23 15:20:13,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:13,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885089716] [2022-11-23 15:20:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:13,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:20:13,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885089716] [2022-11-23 15:20:13,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885089716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024819520] [2022-11-23 15:20:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:13,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:13,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:20:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:20:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:20:14,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:14,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024819520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:14,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:14,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-23 15:20:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256692548] [2022-11-23 15:20:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:20:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:20:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:20:14,313 INFO L87 Difference]: Start difference. First operand 6778 states and 11001 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:20:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:15,073 INFO L93 Difference]: Finished difference Result 14920 states and 24634 transitions. [2022-11-23 15:20:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:20:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 139 [2022-11-23 15:20:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:15,120 INFO L225 Difference]: With dead ends: 14920 [2022-11-23 15:20:15,120 INFO L226 Difference]: Without dead ends: 7611 [2022-11-23 15:20:15,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:20:15,157 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 301 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:15,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 2799 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:20:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2022-11-23 15:20:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 7554. [2022-11-23 15:20:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 5681 states have (on average 1.4673472980109137) internal successors, (8336), 5922 states have internal predecessors, (8336), 1338 states have call successors, (1338), 400 states have call predecessors, (1338), 534 states have return successors, (2234), 1375 states have call predecessors, (2234), 1330 states have call successors, (2234) [2022-11-23 15:20:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11908 transitions. [2022-11-23 15:20:15,685 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11908 transitions. Word has length 139 [2022-11-23 15:20:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:15,686 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11908 transitions. [2022-11-23 15:20:15,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:20:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11908 transitions. [2022-11-23 15:20:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 15:20:15,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:15,695 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:15,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:20:15,903 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1163519774, now seen corresponding path program 1 times [2022-11-23 15:20:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840598611] [2022-11-23 15:20:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:20:16,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840598611] [2022-11-23 15:20:16,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840598611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184685076] [2022-11-23 15:20:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:16,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:16,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:16,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:20:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 15:20:16,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:20:17,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:17,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184685076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:17,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:17,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-23 15:20:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48632114] [2022-11-23 15:20:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:17,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:20:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:20:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:20:17,543 INFO L87 Difference]: Start difference. First operand 7554 states and 11908 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:20:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:23,457 INFO L93 Difference]: Finished difference Result 30912 states and 50838 transitions. [2022-11-23 15:20:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:20:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 137 [2022-11-23 15:20:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:23,602 INFO L225 Difference]: With dead ends: 30912 [2022-11-23 15:20:23,603 INFO L226 Difference]: Without dead ends: 23855 [2022-11-23 15:20:23,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:20:23,664 INFO L413 NwaCegarLoop]: 2191 mSDtfsCounter, 2803 mSDsluCounter, 4844 mSDsCounter, 0 mSdLazyCounter, 2987 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2816 SdHoareTripleChecker+Valid, 7035 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:23,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2816 Valid, 7035 Invalid, 3142 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [155 Valid, 2987 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 15:20:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23855 states. [2022-11-23 15:20:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23855 to 19866. [2022-11-23 15:20:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19866 states, 15275 states have (on average 1.4386252045826513) internal successors, (21975), 15749 states have internal predecessors, (21975), 3103 states have call successors, (3103), 1080 states have call predecessors, (3103), 1487 states have return successors, (6975), 3228 states have call predecessors, (6975), 3085 states have call successors, (6975) [2022-11-23 15:20:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19866 states to 19866 states and 32053 transitions. [2022-11-23 15:20:25,354 INFO L78 Accepts]: Start accepts. Automaton has 19866 states and 32053 transitions. Word has length 137 [2022-11-23 15:20:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:25,354 INFO L495 AbstractCegarLoop]: Abstraction has 19866 states and 32053 transitions. [2022-11-23 15:20:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:20:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19866 states and 32053 transitions. [2022-11-23 15:20:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-23 15:20:25,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:25,376 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 15:20:25,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:25,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:25,584 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1051233269, now seen corresponding path program 1 times [2022-11-23 15:20:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:25,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392200336] [2022-11-23 15:20:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 15:20:25,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392200336] [2022-11-23 15:20:25,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392200336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703456648] [2022-11-23 15:20:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:25,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:25,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:20:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:20:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:20:26,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703456648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:26,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-23 15:20:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481675324] [2022-11-23 15:20:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:20:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:20:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:20:26,259 INFO L87 Difference]: Start difference. First operand 19866 states and 32053 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:27,788 INFO L93 Difference]: Finished difference Result 39717 states and 66864 transitions. [2022-11-23 15:20:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:20:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 138 [2022-11-23 15:20:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:27,955 INFO L225 Difference]: With dead ends: 39717 [2022-11-23 15:20:27,955 INFO L226 Difference]: Without dead ends: 22251 [2022-11-23 15:20:28,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:20:28,338 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 105 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:28,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1367 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:20:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-11-23 15:20:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 20062. [2022-11-23 15:20:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20062 states, 15443 states have (on average 1.4356666450819142) internal successors, (22171), 15917 states have internal predecessors, (22171), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-11-23 15:20:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 32305 transitions. [2022-11-23 15:20:30,099 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 32305 transitions. Word has length 138 [2022-11-23 15:20:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:30,100 INFO L495 AbstractCegarLoop]: Abstraction has 20062 states and 32305 transitions. [2022-11-23 15:20:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 15:20:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 32305 transitions. [2022-11-23 15:20:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:20:30,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:30,196 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 15:20:30,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:30,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:20:30,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 94562958, now seen corresponding path program 1 times [2022-11-23 15:20:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194233586] [2022-11-23 15:20:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:30,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:20:30,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:30,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194233586] [2022-11-23 15:20:30,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194233586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132766844] [2022-11-23 15:20:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:30,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:30,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:20:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:20:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:20:31,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:31,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132766844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:31,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:31,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-23 15:20:31,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336863301] [2022-11-23 15:20:31,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:31,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:20:31,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:20:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:20:31,282 INFO L87 Difference]: Start difference. First operand 20062 states and 32305 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-23 15:20:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:36,511 INFO L93 Difference]: Finished difference Result 42989 states and 70658 transitions. [2022-11-23 15:20:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:20:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 139 [2022-11-23 15:20:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:36,624 INFO L225 Difference]: With dead ends: 42989 [2022-11-23 15:20:36,624 INFO L226 Difference]: Without dead ends: 22496 [2022-11-23 15:20:36,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:20:36,702 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1654 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 4989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:36,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 1791 Invalid, 4989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 15:20:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22496 states. [2022-11-23 15:20:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22496 to 20042. [2022-11-23 15:20:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20042 states, 15423 states have (on average 1.4359722492381508) internal successors, (22147), 15897 states have internal predecessors, (22147), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-11-23 15:20:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20042 states to 20042 states and 32281 transitions. [2022-11-23 15:20:38,760 INFO L78 Accepts]: Start accepts. Automaton has 20042 states and 32281 transitions. Word has length 139 [2022-11-23 15:20:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:38,761 INFO L495 AbstractCegarLoop]: Abstraction has 20042 states and 32281 transitions. [2022-11-23 15:20:38,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-11-23 15:20:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20042 states and 32281 transitions. [2022-11-23 15:20:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 15:20:38,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:38,775 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 15:20:38,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:38,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:20:38,976 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1474063787, now seen corresponding path program 1 times [2022-11-23 15:20:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299539652] [2022-11-23 15:20:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:38,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 15:20:39,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:39,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299539652] [2022-11-23 15:20:39,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299539652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:39,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409904965] [2022-11-23 15:20:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:39,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:39,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:39,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:20:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:20:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:20:40,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:20:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409904965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:20:40,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:20:40,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-23 15:20:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295636311] [2022-11-23 15:20:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:20:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:20:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:20:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:20:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:20:40,158 INFO L87 Difference]: Start difference. First operand 20042 states and 32281 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-23 15:20:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:20:42,646 INFO L93 Difference]: Finished difference Result 45870 states and 76443 transitions. [2022-11-23 15:20:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:20:42,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 145 [2022-11-23 15:20:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:20:42,965 INFO L225 Difference]: With dead ends: 45870 [2022-11-23 15:20:42,965 INFO L226 Difference]: Without dead ends: 25840 [2022-11-23 15:20:43,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:20:43,040 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 486 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:20:43,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1342 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:20:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2022-11-23 15:20:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 25498. [2022-11-23 15:20:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25498 states, 19716 states have (on average 1.4389835666463786) internal successors, (28371), 20318 states have internal predecessors, (28371), 3899 states have call successors, (3899), 1347 states have call predecessors, (3899), 1882 states have return successors, (8998), 4072 states have call predecessors, (8998), 3881 states have call successors, (8998) [2022-11-23 15:20:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25498 states to 25498 states and 41268 transitions. [2022-11-23 15:20:45,294 INFO L78 Accepts]: Start accepts. Automaton has 25498 states and 41268 transitions. Word has length 145 [2022-11-23 15:20:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:20:45,294 INFO L495 AbstractCegarLoop]: Abstraction has 25498 states and 41268 transitions. [2022-11-23 15:20:45,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-23 15:20:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25498 states and 41268 transitions. [2022-11-23 15:20:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-23 15:20:45,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:20:45,311 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:20:45,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:20:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:45,512 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:20:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:20:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -113763681, now seen corresponding path program 1 times [2022-11-23 15:20:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:20:45,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743504779] [2022-11-23 15:20:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:45,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:20:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 15:20:46,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743504779] [2022-11-23 15:20:46,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743504779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:46,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876698029] [2022-11-23 15:20:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:20:46,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:46,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:46,219 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:46,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d24a825d-a4ea-4090-bf15-72a23a80e6c3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 15:20:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:46,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:20:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:20:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:20:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:20:47,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876698029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:20:47,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017035064] [2022-11-23 15:20:47,475 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-23 15:20:47,475 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:20:47,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:20:47,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:20:47,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:20:53,076 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 15:21:01,216 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-23 15:21:01,569 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-23 15:21:03,799 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-23 15:21:04,003 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-11-23 15:21:04,079 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 15:21:04,156 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-23 15:21:07,959 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 15:21:08,575 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 15:21:08,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:42,287 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:49,796 WARN L233 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:21:58,601 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:17,369 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:23,447 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 610 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:31,646 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:37,985 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:48,002 WARN L233 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:22:58,234 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:04,672 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 622 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:11,218 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 622 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:18,791 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 625 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:25,353 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 625 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:25,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1017035064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:23:25,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:23:25,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 6, 7] total 44 [2022-11-23 15:23:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562897838] [2022-11-23 15:23:25,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:23:25,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 15:23:25,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 15:23:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:23:25,370 INFO L87 Difference]: Start difference. First operand 25498 states and 41268 transitions. Second operand has 29 states, 21 states have (on average 4.285714285714286) internal successors, (90), 17 states have internal predecessors, (90), 11 states have call successors, (26), 8 states have call predecessors, (26), 9 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-23 15:23:32,398 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:38,864 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:45,204 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:23:50,914 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:24:02,520 WARN L233 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:24:13,819 WARN L233 SmtUtils]: Spent 10.97s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)