./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:22:36,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:22:36,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:22:36,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:22:36,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:22:36,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:22:36,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:22:36,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:22:36,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:22:36,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:22:36,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:22:36,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:22:36,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:22:36,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:22:36,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:22:36,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:22:36,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:22:36,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:22:36,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:22:36,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:22:36,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:22:36,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:22:36,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:22:36,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:22:36,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:22:36,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:22:36,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:22:36,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:22:36,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:22:36,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:22:36,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:22:36,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:22:36,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:22:36,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:22:36,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:22:36,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:22:36,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:22:36,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:22:36,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:22:36,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:22:36,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:22:36,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:22:36,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:22:36,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:22:36,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:22:36,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:22:36,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:22:36,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:22:36,887 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:22:36,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:22:36,888 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:22:36,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:22:36,888 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:22:36,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:22:36,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:22:36,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:22:36,889 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:22:36,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:22:36,890 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:22:36,890 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:22:36,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:22:36,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:22:36,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:22:36,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:22:36,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:22:36,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:22:36,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:22:36,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:22:36,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:22:36,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:22:36,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:22:36,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:22:36,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:22:36,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:22:36,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:22:36,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:22:36,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:22:36,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:22:36,896 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_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2022-11-03 02:22:37,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:22:37,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:22:37,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:22:37,292 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:22:37,293 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:22:37,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2022-11-03 02:22:37,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/data/279935de3/83394165b6fa4b719713592e51c12a92/FLAG543fa4a89 [2022-11-03 02:22:37,992 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:22:37,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2022-11-03 02:22:38,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/data/279935de3/83394165b6fa4b719713592e51c12a92/FLAG543fa4a89 [2022-11-03 02:22:38,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/data/279935de3/83394165b6fa4b719713592e51c12a92 [2022-11-03 02:22:38,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:22:38,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:22:38,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:22:38,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:22:38,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:22:38,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:22:38" (1/1) ... [2022-11-03 02:22:38,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9cf84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:38, skipping insertion in model container [2022-11-03 02:22:38,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:22:38" (1/1) ... [2022-11-03 02:22:38,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:22:38,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:22:38,957 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2022-11-03 02:22:38,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:22:38,971 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:22:39,101 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2022-11-03 02:22:39,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:22:39,144 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:22:39,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39 WrapperNode [2022-11-03 02:22:39,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:22:39,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:22:39,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:22:39,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:22:39,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,256 INFO L138 Inliner]: procedures = 93, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1060 [2022-11-03 02:22:39,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:22:39,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:22:39,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:22:39,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:22:39,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:22:39,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:22:39,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:22:39,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:22:39,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (1/1) ... [2022-11-03 02:22:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:22:39,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:39,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:22:39,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:22:39,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:22:39,454 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:22:39,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:22:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:22:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:22:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-03 02:22:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-03 02:22:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:22:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:22:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:22:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:22:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:22:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:22:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:22:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:22:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:22:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:22:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:22:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:22:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:22:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:22:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 02:22:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 02:22:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:22:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:22:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:22:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:22:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:22:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:22:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:22:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:22:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:22:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:22:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:22:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:22:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:22:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:22:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:22:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:22:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:22:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:22:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:22:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:22:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:22:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:22:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:22:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:22:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:22:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:22:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:22:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:22:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:22:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 02:22:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 02:22:39,626 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:22:39,643 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:22:40,971 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:22:41,738 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:22:41,738 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:22:41,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:41 BoogieIcfgContainer [2022-11-03 02:22:41,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:22:41,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:22:41,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:22:41,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:22:41,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:22:38" (1/3) ... [2022-11-03 02:22:41,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df6390d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:41, skipping insertion in model container [2022-11-03 02:22:41,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:39" (2/3) ... [2022-11-03 02:22:41,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df6390d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:41, skipping insertion in model container [2022-11-03 02:22:41,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:41" (3/3) ... [2022-11-03 02:22:41,756 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2022-11-03 02:22:41,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:22:41,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:22:41,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:22:41,892 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;@4bd800e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:22:41,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:22:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 02:22:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:22:41,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:41,919 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] [2022-11-03 02:22:41,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1511069101, now seen corresponding path program 1 times [2022-11-03 02:22:41,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:41,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081953746] [2022-11-03 02:22:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:41,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:22:42,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:42,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081953746] [2022-11-03 02:22:42,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081953746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:42,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:42,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376071148] [2022-11-03 02:22:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:42,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:42,852 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:22:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:43,384 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-11-03 02:22:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-03 02:22:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:43,421 INFO L225 Difference]: With dead ends: 1074 [2022-11-03 02:22:43,422 INFO L226 Difference]: Without dead ends: 709 [2022-11-03 02:22:43,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:43,440 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 546 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:43,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1196 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-03 02:22:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-11-03 02:22:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-11-03 02:22:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-11-03 02:22:43,655 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-11-03 02:22:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:43,656 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-11-03 02:22:43,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:22:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-11-03 02:22:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:22:43,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:43,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:43,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:22:43,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1681850943, now seen corresponding path program 1 times [2022-11-03 02:22:43,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:43,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152290696] [2022-11-03 02:22:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:43,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:22:44,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152290696] [2022-11-03 02:22:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152290696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:44,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:44,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:22:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937297207] [2022-11-03 02:22:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:22:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:22:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:22:44,179 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:22:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:47,443 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-11-03 02:22:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:22:47,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-03 02:22:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:47,462 INFO L225 Difference]: With dead ends: 2177 [2022-11-03 02:22:47,462 INFO L226 Difference]: Without dead ends: 1516 [2022-11-03 02:22:47,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:22:47,474 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1074 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:47,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1533 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 02:22:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-03 02:22:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-11-03 02:22:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-11-03 02:22:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-11-03 02:22:47,604 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-11-03 02:22:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:47,605 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-11-03 02:22:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:22:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-11-03 02:22:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:22:47,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:47,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:22:47,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash -337662260, now seen corresponding path program 1 times [2022-11-03 02:22:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:47,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886889153] [2022-11-03 02:22:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:47,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:22:48,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886889153] [2022-11-03 02:22:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886889153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:48,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:22:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594153865] [2022-11-03 02:22:48,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:48,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:22:48,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:22:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:22:48,458 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:22:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:51,620 INFO L93 Difference]: Finished difference Result 2024 states and 3264 transitions. [2022-11-03 02:22:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:22:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-03 02:22:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:51,636 INFO L225 Difference]: With dead ends: 2024 [2022-11-03 02:22:51,637 INFO L226 Difference]: Without dead ends: 2022 [2022-11-03 02:22:51,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:22:51,640 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 1385 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:51,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2272 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2930 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:22:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-11-03 02:22:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1784. [2022-11-03 02:22:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1173 states have (on average 1.5123614663256606) internal successors, (1774), 1249 states have internal predecessors, (1774), 483 states have call successors, (483), 121 states have call predecessors, (483), 127 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2022-11-03 02:22:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2808 transitions. [2022-11-03 02:22:51,834 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2808 transitions. Word has length 91 [2022-11-03 02:22:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:51,835 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 2808 transitions. [2022-11-03 02:22:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:22:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2808 transitions. [2022-11-03 02:22:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:22:51,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:51,842 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-03 02:22:51,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:22:51,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 845153710, now seen corresponding path program 1 times [2022-11-03 02:22:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:51,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164510591] [2022-11-03 02:22:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:51,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:22:52,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164510591] [2022-11-03 02:22:52,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164510591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217838569] [2022-11-03 02:22:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:52,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:52,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:52,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:52,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:22:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:22:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:22:52,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:52,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217838569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:52,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:52,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 02:22:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396355860] [2022-11-03 02:22:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:52,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:22:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:22:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:22:52,950 INFO L87 Difference]: Start difference. First operand 1784 states and 2808 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:22:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:53,739 INFO L93 Difference]: Finished difference Result 3555 states and 5629 transitions. [2022-11-03 02:22:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:22:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2022-11-03 02:22:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:53,755 INFO L225 Difference]: With dead ends: 3555 [2022-11-03 02:22:53,755 INFO L226 Difference]: Without dead ends: 1782 [2022-11-03 02:22:53,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:22:53,769 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 375 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:53,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 2469 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:22:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-11-03 02:22:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1780. [2022-11-03 02:22:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:22:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2022-11-03 02:22:53,986 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 121 [2022-11-03 02:22:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:53,987 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2022-11-03 02:22:53,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:22:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2022-11-03 02:22:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:22:53,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:53,993 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-03 02:22:54,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:54,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:54,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -554502647, now seen corresponding path program 1 times [2022-11-03 02:22:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:54,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423851387] [2022-11-03 02:22:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 02:22:54,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423851387] [2022-11-03 02:22:54,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423851387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:54,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:54,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:22:54,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297029099] [2022-11-03 02:22:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:22:54,509 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:22:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:54,815 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2022-11-03 02:22:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:22:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-11-03 02:22:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:54,834 INFO L225 Difference]: With dead ends: 3646 [2022-11-03 02:22:54,834 INFO L226 Difference]: Without dead ends: 1878 [2022-11-03 02:22:54,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:22:54,854 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 30 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:54,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1567 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-03 02:22:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2022-11-03 02:22:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:22:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2022-11-03 02:22:55,056 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2022-11-03 02:22:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:55,058 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2022-11-03 02:22:55,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:22:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2022-11-03 02:22:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:22:55,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:55,063 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2022-11-03 02:22:55,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:22:55,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash 530590405, now seen corresponding path program 1 times [2022-11-03 02:22:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:55,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175668835] [2022-11-03 02:22:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:22:55,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175668835] [2022-11-03 02:22:55,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175668835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:55,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634076758] [2022-11-03 02:22:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:55,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:55,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:55,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:55,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:22:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:22:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:22:55,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:55,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634076758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:55,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:55,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-03 02:22:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803212039] [2022-11-03 02:22:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:55,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:22:55,943 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:56,430 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2022-11-03 02:22:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:22:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2022-11-03 02:22:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:56,447 INFO L225 Difference]: With dead ends: 3728 [2022-11-03 02:22:56,447 INFO L226 Difference]: Without dead ends: 1948 [2022-11-03 02:22:56,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:22:56,462 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:56,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-11-03 02:22:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2022-11-03 02:22:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:22:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-11-03 02:22:56,638 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2022-11-03 02:22:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:56,639 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-11-03 02:22:56,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-11-03 02:22:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:56,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:56,649 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2022-11-03 02:22:56,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:56,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1414446969, now seen corresponding path program 1 times [2022-11-03 02:22:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430383709] [2022-11-03 02:22:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:22:57,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:57,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430383709] [2022-11-03 02:22:57,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430383709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:57,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867537712] [2022-11-03 02:22:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:57,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:57,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:22:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:22:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:22:57,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:57,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867537712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:57,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:57,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:22:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430656061] [2022-11-03 02:22:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:57,514 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:57,959 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-11-03 02:22:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:22:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2022-11-03 02:22:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:57,978 INFO L225 Difference]: With dead ends: 4040 [2022-11-03 02:22:57,978 INFO L226 Difference]: Without dead ends: 2104 [2022-11-03 02:22:57,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:22:57,992 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:57,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-11-03 02:22:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-11-03 02:22:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:22:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-11-03 02:22:58,186 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-11-03 02:22:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:58,187 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-11-03 02:22:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-11-03 02:22:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:22:58,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:58,194 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2022-11-03 02:22:58,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:22:58,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:58,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1716168489, now seen corresponding path program 1 times [2022-11-03 02:22:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670101952] [2022-11-03 02:22:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:58,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 02:22:58,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670101952] [2022-11-03 02:22:58,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670101952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502111326] [2022-11-03 02:22:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:58,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:58,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:58,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:58,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:22:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:22:59,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:22:59,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502111326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:59,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:59,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:22:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874816061] [2022-11-03 02:22:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:59,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:59,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:59,074 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:59,482 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-11-03 02:22:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:22:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-11-03 02:22:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:59,499 INFO L225 Difference]: With dead ends: 4352 [2022-11-03 02:22:59,500 INFO L226 Difference]: Without dead ends: 2260 [2022-11-03 02:22:59,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:22:59,511 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:59,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-03 02:22:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-03 02:22:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:22:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-11-03 02:22:59,688 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-11-03 02:22:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:59,689 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-11-03 02:22:59,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:22:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-11-03 02:22:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:22:59,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:59,695 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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] [2022-11-03 02:22:59,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:22:59,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1749751387, now seen corresponding path program 1 times [2022-11-03 02:22:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302820758] [2022-11-03 02:22:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:23:00,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:00,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302820758] [2022-11-03 02:23:00,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302820758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883453525] [2022-11-03 02:23:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:00,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:00,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:00,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:23:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:23:00,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:23:00,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:23:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883453525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:23:00,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:23:00,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:23:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604883265] [2022-11-03 02:23:00,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:23:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:23:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:23:00,498 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:23:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:00,962 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-11-03 02:23:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:23:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2022-11-03 02:23:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:00,980 INFO L225 Difference]: With dead ends: 4664 [2022-11-03 02:23:00,981 INFO L226 Difference]: Without dead ends: 2416 [2022-11-03 02:23:00,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:23:00,996 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:00,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:23:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-03 02:23:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-11-03 02:23:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:23:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-11-03 02:23:01,211 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-11-03 02:23:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:01,211 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-11-03 02:23:01,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:23:01,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-11-03 02:23:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:23:01,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:01,222 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-03 02:23:01,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:01,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2114211893, now seen corresponding path program 1 times [2022-11-03 02:23:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:01,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841952707] [2022-11-03 02:23:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:23:01,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841952707] [2022-11-03 02:23:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841952707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:23:01,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:23:01,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:23:01,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335382165] [2022-11-03 02:23:01,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:01,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:23:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:23:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:23:01,622 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:23:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:02,057 INFO L93 Difference]: Finished difference Result 4988 states and 8266 transitions. [2022-11-03 02:23:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:23:02,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 139 [2022-11-03 02:23:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:02,077 INFO L225 Difference]: With dead ends: 4988 [2022-11-03 02:23:02,077 INFO L226 Difference]: Without dead ends: 2552 [2022-11-03 02:23:02,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:23:02,090 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 99 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:02,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1372 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:23:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-11-03 02:23:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2552. [2022-11-03 02:23:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1925 states have (on average 1.5698701298701299) internal successors, (3022), 1997 states have internal predecessors, (3022), 479 states have call successors, (479), 141 states have call predecessors, (479), 147 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-03 02:23:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4040 transitions. [2022-11-03 02:23:02,312 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4040 transitions. Word has length 139 [2022-11-03 02:23:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:02,313 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4040 transitions. [2022-11-03 02:23:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:23:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4040 transitions. [2022-11-03 02:23:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:23:02,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:02,320 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 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] [2022-11-03 02:23:02,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:23:02,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1152971740, now seen corresponding path program 1 times [2022-11-03 02:23:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570677814] [2022-11-03 02:23:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:23:02,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:02,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570677814] [2022-11-03 02:23:02,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570677814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:23:02,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:23:02,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:23:02,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669833667] [2022-11-03 02:23:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:23:02,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:23:02,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:23:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:23:02,672 INFO L87 Difference]: Start difference. First operand 2552 states and 4040 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-03 02:23:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:06,632 INFO L93 Difference]: Finished difference Result 6565 states and 10555 transitions. [2022-11-03 02:23:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:23:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 139 [2022-11-03 02:23:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:06,669 INFO L225 Difference]: With dead ends: 6565 [2022-11-03 02:23:06,669 INFO L226 Difference]: Without dead ends: 3660 [2022-11-03 02:23:06,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:23:06,685 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 1576 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 4730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:06,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 2318 Invalid, 4730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 3879 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:23:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2022-11-03 02:23:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3482. [2022-11-03 02:23:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 2496 states have (on average 1.4911858974358974) internal successors, (3722), 2626 states have internal predecessors, (3722), 745 states have call successors, (745), 215 states have call predecessors, (745), 240 states have return successors, (928), 697 states have call predecessors, (928), 739 states have call successors, (928) [2022-11-03 02:23:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5395 transitions. [2022-11-03 02:23:06,997 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5395 transitions. Word has length 139 [2022-11-03 02:23:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:06,998 INFO L495 AbstractCegarLoop]: Abstraction has 3482 states and 5395 transitions. [2022-11-03 02:23:06,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-03 02:23:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5395 transitions. [2022-11-03 02:23:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:23:07,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:07,005 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-03 02:23:07,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:23:07,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1536148153, now seen corresponding path program 1 times [2022-11-03 02:23:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:07,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450309682] [2022-11-03 02:23:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:23:09,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450309682] [2022-11-03 02:23:09,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450309682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189276197] [2022-11-03 02:23:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:09,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:09,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:09,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:23:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:09,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:23:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 02:23:11,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:03,249 WARN L234 SmtUtils]: Spent 48.28s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 02:24:52,646 WARN L234 SmtUtils]: Spent 47.82s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 02:24:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 02:24:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189276197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416123262] [2022-11-03 02:24:54,371 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-03 02:24:54,371 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:54,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:54,380 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:54,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:57,122 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-03 02:25:03,804 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-03 02:25:10,422 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 109 for LOIs [2022-11-03 02:25:10,894 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 506 for LOIs [2022-11-03 02:25:11,094 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 503 for LOIs [2022-11-03 02:25:12,235 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 444 for LOIs [2022-11-03 02:25:13,009 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 47 for LOIs [2022-11-03 02:25:13,022 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 84 for LOIs [2022-11-03 02:25:13,039 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2022-11-03 02:25:13,043 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-03 02:25:16,353 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-03 02:25:16,910 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-03 02:25:17,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:25:40,036 WARN L234 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:25:47,697 WARN L234 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:25:57,092 WARN L234 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:20,706 WARN L234 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 618 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:26,795 WARN L234 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:42,041 WARN L234 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:48,733 WARN L234 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:55,650 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 613 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:27:48,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88931#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= |timeShift_isExecutiveFloor_#res#1| 0) (= |old(~floorButtons_0~0)| 0) (<= ~floorButtons_0~0 0) (= |old(~blocked~0)| 0) (<= 1 |timeShift_~tmp~26#1|) (<= ~calls_0~0 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 0 |timeShift_isExecutiveFloor_~retValue_acc~26#1|) (<= 0 |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (<= 0 ~floorButtons_0~0) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (= ~doorState~0 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_~tmp~26#1| 1) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= |timeShift_isExecutiveFloor_~retValue_acc~26#1| 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-03 02:27:48,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:48,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:27:48,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 16] total 50 [2022-11-03 02:27:48,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196197434] [2022-11-03 02:27:48,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:27:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:27:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1165, Invalid=11945, Unknown=0, NotChecked=0, Total=13110 [2022-11-03 02:27:48,109 INFO L87 Difference]: Start difference. First operand 3482 states and 5395 transitions. Second operand has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-03 02:28:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:15,551 INFO L93 Difference]: Finished difference Result 11573 states and 18641 transitions. [2022-11-03 02:28:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-03 02:28:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) Word has length 140 [2022-11-03 02:28:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:15,605 INFO L225 Difference]: With dead ends: 11573 [2022-11-03 02:28:15,606 INFO L226 Difference]: Without dead ends: 6460 [2022-11-03 02:28:15,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 331 SyntacticMatches, 22 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17515 ImplicationChecksByTransitivity, 158.6s TimeCoverageRelationStatistics Valid=3791, Invalid=38029, Unknown=0, NotChecked=0, Total=41820 [2022-11-03 02:28:15,653 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 9389 mSDsluCounter, 7045 mSDsCounter, 0 mSdLazyCounter, 23383 mSolverCounterSat, 7379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9434 SdHoareTripleChecker+Valid, 7202 SdHoareTripleChecker+Invalid, 30762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 7379 IncrementalHoareTripleChecker+Valid, 23383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:15,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9434 Valid, 7202 Invalid, 30762 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [7379 Valid, 23383 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-03 02:28:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-11-03 02:28:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 5809. [2022-11-03 02:28:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4032 states have (on average 1.3948412698412698) internal successors, (5624), 4297 states have internal predecessors, (5624), 1317 states have call successors, (1317), 399 states have call predecessors, (1317), 459 states have return successors, (1698), 1216 states have call predecessors, (1698), 1311 states have call successors, (1698) [2022-11-03 02:28:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8639 transitions. [2022-11-03 02:28:16,391 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8639 transitions. Word has length 140 [2022-11-03 02:28:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:16,394 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8639 transitions. [2022-11-03 02:28:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-03 02:28:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8639 transitions. [2022-11-03 02:28:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:28:16,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:16,404 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-03 02:28:16,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:16,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:28:16,619 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash 39205283, now seen corresponding path program 1 times [2022-11-03 02:28:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:16,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684145527] [2022-11-03 02:28:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-03 02:28:16,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684145527] [2022-11-03 02:28:16,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684145527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013403239] [2022-11-03 02:28:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:16,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:16,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:28:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:28:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:28:17,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:17,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013403239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:17,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:17,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-03 02:28:17,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867877253] [2022-11-03 02:28:17,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:28:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:28:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:28:17,982 INFO L87 Difference]: Start difference. First operand 5809 states and 8639 transitions. Second operand has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-03 02:28:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:23,504 INFO L93 Difference]: Finished difference Result 13543 states and 20322 transitions. [2022-11-03 02:28:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:28:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 145 [2022-11-03 02:28:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:23,559 INFO L225 Difference]: With dead ends: 13543 [2022-11-03 02:28:23,559 INFO L226 Difference]: Without dead ends: 7748 [2022-11-03 02:28:23,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:28:23,589 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2458 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2633 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 6017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1545 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:23,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2633 Valid, 1751 Invalid, 6017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1545 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:28:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2022-11-03 02:28:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 7428. [2022-11-03 02:28:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 5262 states have (on average 1.3759026985936906) internal successors, (7240), 5556 states have internal predecessors, (7240), 1557 states have call successors, (1557), 539 states have call predecessors, (1557), 608 states have return successors, (1999), 1443 states have call predecessors, (1999), 1549 states have call successors, (1999) [2022-11-03 02:28:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 10796 transitions. [2022-11-03 02:28:24,442 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 10796 transitions. Word has length 145 [2022-11-03 02:28:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:24,443 INFO L495 AbstractCegarLoop]: Abstraction has 7428 states and 10796 transitions. [2022-11-03 02:28:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-03 02:28:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 10796 transitions. [2022-11-03 02:28:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-03 02:28:24,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:24,466 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:28:24,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:24,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:24,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1643209072, now seen corresponding path program 1 times [2022-11-03 02:28:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380961951] [2022-11-03 02:28:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-03 02:28:25,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380961951] [2022-11-03 02:28:25,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380961951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798400644] [2022-11-03 02:28:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:25,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:25,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:28:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 3873 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:28:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2022-11-03 02:28:26,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:26,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798400644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:26,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:26,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-11-03 02:28:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235171744] [2022-11-03 02:28:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:28:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:28:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:28:26,948 INFO L87 Difference]: Start difference. First operand 7428 states and 10796 transitions. Second operand has 10 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-03 02:28:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:30,476 INFO L93 Difference]: Finished difference Result 12638 states and 18311 transitions. [2022-11-03 02:28:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:28:30,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 356 [2022-11-03 02:28:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:30,517 INFO L225 Difference]: With dead ends: 12638 [2022-11-03 02:28:30,517 INFO L226 Difference]: Without dead ends: 6554 [2022-11-03 02:28:30,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:28:30,541 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 1367 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 4017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:30,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 3306 Invalid, 4017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:28:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2022-11-03 02:28:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 6416. [2022-11-03 02:28:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4491 states have (on average 1.3691828100645735) internal successors, (6149), 4726 states have internal predecessors, (6149), 1384 states have call successors, (1384), 505 states have call predecessors, (1384), 540 states have return successors, (1744), 1277 states have call predecessors, (1744), 1376 states have call successors, (1744) [2022-11-03 02:28:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 9277 transitions. [2022-11-03 02:28:31,219 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 9277 transitions. Word has length 356 [2022-11-03 02:28:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:31,220 INFO L495 AbstractCegarLoop]: Abstraction has 6416 states and 9277 transitions. [2022-11-03 02:28:31,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-03 02:28:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 9277 transitions. [2022-11-03 02:28:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-03 02:28:31,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:31,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:31,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:31,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1189618851, now seen corresponding path program 1 times [2022-11-03 02:28:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950841731] [2022-11-03 02:28:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 02:28:31,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950841731] [2022-11-03 02:28:31,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950841731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230190994] [2022-11-03 02:28:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:31,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:31,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:31,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:28:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:28:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:28:32,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:32,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230190994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:32,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:32,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:28:32,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618636015] [2022-11-03 02:28:32,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:32,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:28:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:28:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:28:32,972 INFO L87 Difference]: Start difference. First operand 6416 states and 9277 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:28:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:38,538 INFO L93 Difference]: Finished difference Result 15560 states and 23019 transitions. [2022-11-03 02:28:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:28:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-11-03 02:28:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:38,602 INFO L225 Difference]: With dead ends: 15560 [2022-11-03 02:28:38,602 INFO L226 Difference]: Without dead ends: 9526 [2022-11-03 02:28:38,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:28:38,634 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 1599 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 5013 mSolverCounterSat, 1038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 6051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 5013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:38,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 2382 Invalid, 6051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 5013 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:28:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2022-11-03 02:28:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8350. [2022-11-03 02:28:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 5749 states have (on average 1.3609323360584449) internal successors, (7824), 6101 states have internal predecessors, (7824), 1928 states have call successors, (1928), 622 states have call predecessors, (1928), 672 states have return successors, (2410), 1821 states have call predecessors, (2410), 1918 states have call successors, (2410) [2022-11-03 02:28:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12162 transitions. [2022-11-03 02:28:39,645 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12162 transitions. Word has length 226 [2022-11-03 02:28:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:39,645 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 12162 transitions. [2022-11-03 02:28:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:28:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12162 transitions. [2022-11-03 02:28:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-03 02:28:39,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:39,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:39,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:39,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:39,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash 867749839, now seen corresponding path program 1 times [2022-11-03 02:28:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:39,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458335170] [2022-11-03 02:28:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:39,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 02:28:40,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458335170] [2022-11-03 02:28:40,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458335170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281921570] [2022-11-03 02:28:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:40,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:28:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:28:40,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:28:41,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:41,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281921570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:41,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:41,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:28:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201347716] [2022-11-03 02:28:41,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:28:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:28:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:28:41,250 INFO L87 Difference]: Start difference. First operand 8350 states and 12162 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:28:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:46,950 INFO L93 Difference]: Finished difference Result 22639 states and 33868 transitions. [2022-11-03 02:28:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:28:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-11-03 02:28:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:47,045 INFO L225 Difference]: With dead ends: 22639 [2022-11-03 02:28:47,046 INFO L226 Difference]: Without dead ends: 14693 [2022-11-03 02:28:47,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:28:47,091 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 1487 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 4971 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 2346 SdHoareTripleChecker+Invalid, 5969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 4971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:47,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1668 Valid, 2346 Invalid, 5969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 4971 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:28:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14693 states. [2022-11-03 02:28:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14693 to 12999. [2022-11-03 02:28:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 8717 states have (on average 1.3540208787426866) internal successors, (11803), 9327 states have internal predecessors, (11803), 3295 states have call successors, (3295), 898 states have call predecessors, (3295), 986 states have return successors, (4153), 3189 states have call predecessors, (4153), 3281 states have call successors, (4153) [2022-11-03 02:28:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19251 transitions. [2022-11-03 02:28:48,632 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19251 transitions. Word has length 226 [2022-11-03 02:28:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:48,633 INFO L495 AbstractCegarLoop]: Abstraction has 12999 states and 19251 transitions. [2022-11-03 02:28:48,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:28:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19251 transitions. [2022-11-03 02:28:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-03 02:28:48,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:48,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:48,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:48,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:28:48,887 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash 349177571, now seen corresponding path program 1 times [2022-11-03 02:28:48,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:48,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5266106] [2022-11-03 02:28:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:48,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 02:28:49,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5266106] [2022-11-03 02:28:49,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5266106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971256360] [2022-11-03 02:28:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:49,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:49,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:49,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:28:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:28:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:28:50,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:50,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971256360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:50,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:50,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:28:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115066587] [2022-11-03 02:28:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:28:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:28:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:28:50,197 INFO L87 Difference]: Start difference. First operand 12999 states and 19251 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:28:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:57,392 INFO L93 Difference]: Finished difference Result 35489 states and 54414 transitions. [2022-11-03 02:28:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:28:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-11-03 02:28:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:57,564 INFO L225 Difference]: With dead ends: 35489 [2022-11-03 02:28:57,565 INFO L226 Difference]: Without dead ends: 26006 [2022-11-03 02:28:57,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:28:57,640 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 1114 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 5602 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 6310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 2592 Invalid, 6310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5602 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 02:28:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26006 states. [2022-11-03 02:29:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26006 to 22278. [2022-11-03 02:29:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22278 states, 14257 states have (on average 1.349302097215403) internal successors, (19237), 15546 states have internal predecessors, (19237), 6538 states have call successors, (6538), 1294 states have call predecessors, (6538), 1482 states have return successors, (8258), 6444 states have call predecessors, (8258), 6516 states have call successors, (8258) [2022-11-03 02:29:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22278 states to 22278 states and 34033 transitions. [2022-11-03 02:29:00,553 INFO L78 Accepts]: Start accepts. Automaton has 22278 states and 34033 transitions. Word has length 226 [2022-11-03 02:29:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:00,555 INFO L495 AbstractCegarLoop]: Abstraction has 22278 states and 34033 transitions. [2022-11-03 02:29:00,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:29:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22278 states and 34033 transitions. [2022-11-03 02:29:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-03 02:29:00,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:00,595 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:00,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:29:00,815 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash 701297167, now seen corresponding path program 1 times [2022-11-03 02:29:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:00,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436570373] [2022-11-03 02:29:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 02:29:01,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:01,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436570373] [2022-11-03 02:29:01,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436570373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:01,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96928900] [2022-11-03 02:29:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:01,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:01,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:01,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:29:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:29:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:29:02,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:02,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96928900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:02,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:02,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:29:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027378101] [2022-11-03 02:29:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:29:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:29:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:29:02,155 INFO L87 Difference]: Start difference. First operand 22278 states and 34033 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:29:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:12,581 INFO L93 Difference]: Finished difference Result 72755 states and 115676 transitions. [2022-11-03 02:29:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:29:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-11-03 02:29:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:12,981 INFO L225 Difference]: With dead ends: 72755 [2022-11-03 02:29:12,981 INFO L226 Difference]: Without dead ends: 54253 [2022-11-03 02:29:13,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:29:13,138 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 1171 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 5702 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 6505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 5702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:13,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 2600 Invalid, 6505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 5702 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:29:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54253 states. [2022-11-03 02:29:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54253 to 45373. [2022-11-03 02:29:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45373 states, 27340 states have (on average 1.3460497439648866) internal successors, (36801), 30524 states have internal predecessors, (36801), 15444 states have call successors, (15444), 2128 states have call predecessors, (15444), 2588 states have return successors, (19753), 15370 states have call predecessors, (19753), 15406 states have call successors, (19753) [2022-11-03 02:29:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45373 states to 45373 states and 71998 transitions. [2022-11-03 02:29:19,271 INFO L78 Accepts]: Start accepts. Automaton has 45373 states and 71998 transitions. Word has length 226 [2022-11-03 02:29:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:19,272 INFO L495 AbstractCegarLoop]: Abstraction has 45373 states and 71998 transitions. [2022-11-03 02:29:19,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-03 02:29:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 45373 states and 71998 transitions. [2022-11-03 02:29:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-03 02:29:19,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:19,324 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:19,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:29:19,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1978690481, now seen corresponding path program 1 times [2022-11-03 02:29:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412485260] [2022-11-03 02:29:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 02:29:19,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412485260] [2022-11-03 02:29:19,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412485260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52695097] [2022-11-03 02:29:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:19,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:19,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:19,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01fd803b-4fe0-4f31-a14d-d9b5009949fe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:29:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:20,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:29:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-03 02:29:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 02:29:27,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52695097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071569499] [2022-11-03 02:29:27,077 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-11-03 02:29:27,078 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:27,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:27,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:27,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:35,436 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-11-03 02:29:35,872 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-11-03 02:29:37,325 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-11-03 02:29:39,137 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 81 for LOIs [2022-11-03 02:29:39,516 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 31 for LOIs [2022-11-03 02:29:39,518 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 49 for LOIs [2022-11-03 02:29:39,570 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 34 for LOIs [2022-11-03 02:29:39,635 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-11-03 02:29:39,647 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 55 for LOIs [2022-11-03 02:29:39,920 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 55 for LOIs [2022-11-03 02:29:39,933 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 65 for LOIs [2022-11-03 02:29:39,939 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-03 02:29:43,391 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-11-03 02:29:43,403 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-11-03 02:29:43,415 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-11-03 02:29:45,596 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-11-03 02:29:50,090 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-11-03 02:29:50,656 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:09,552 WARN L234 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 645 DAG size of output: 521 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:30:21,525 WARN L234 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 685 DAG size of output: 535 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:30:29,976 WARN L234 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:30:38,484 WARN L234 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)