./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:28:38,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:28:38,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:28:38,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:28:38,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:28:38,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:28:38,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:28:38,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:28:38,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:28:38,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:28:38,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:28:38,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:28:38,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:28:38,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:28:38,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:28:38,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:28:38,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:28:38,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:28:38,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:28:38,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:28:38,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:28:38,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:28:38,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:28:38,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:28:38,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:28:38,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:28:38,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:28:38,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:28:38,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:28:38,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:28:38,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:28:38,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:28:38,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:28:38,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:28:38,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:28:38,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:28:38,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:28:38,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:28:38,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:28:38,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:28:38,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:28:38,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:28:38,823 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:28:38,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:28:38,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:28:38,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:28:38,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:28:38,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:28:38,824 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:28:38,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:28:38,824 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:28:38,824 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:28:38,825 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:28:38,825 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:28:38,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:28:38,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:28:38,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:28:38,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:28:38,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:28:38,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:28:38,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:28:38,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:28:38,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:28:38,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:28:38,828 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_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2022-12-14 15:28:39,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:28:39,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:28:39,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:28:39,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:28:39,031 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:28:39,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2022-12-14 15:28:41,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:28:41,807 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:28:41,807 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2022-12-14 15:28:41,824 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/data/53a812875/a950cf34f41f4a4ebb0fcad08554cb0c/FLAG543c573ce [2022-12-14 15:28:41,836 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/data/53a812875/a950cf34f41f4a4ebb0fcad08554cb0c [2022-12-14 15:28:41,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:28:41,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:28:41,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:28:41,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:28:41,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:28:41,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:28:41" (1/1) ... [2022-12-14 15:28:41,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d157d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:41, skipping insertion in model container [2022-12-14 15:28:41,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:28:41" (1/1) ... [2022-12-14 15:28:41,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:28:41,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:28:42,295 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2022-12-14 15:28:42,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:28:42,311 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:28:42,423 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2022-12-14 15:28:42,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:28:42,452 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:28:42,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42 WrapperNode [2022-12-14 15:28:42,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:28:42,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:28:42,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:28:42,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:28:42,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,526 INFO L138 Inliner]: procedures = 95, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 863 [2022-12-14 15:28:42,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:28:42,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:28:42,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:28:42,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:28:42,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:28:42,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:28:42,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:28:42,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:28:42,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (1/1) ... [2022-12-14 15:28:42,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:28:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:42,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:28:42,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:28:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:28:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 15:28:42,656 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 15:28:42,656 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 15:28:42,657 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 15:28:42,657 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 15:28:42,657 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 15:28:42,657 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:28:42,657 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:28:42,657 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 15:28:42,657 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 15:28:42,657 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:28:42,658 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:28:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 15:28:42,658 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 15:28:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:28:42,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:28:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:28:42,658 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:28:42,658 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:28:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:28:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 15:28:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 15:28:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:28:42,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:28:42,659 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:28:42,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:28:42,660 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:28:42,660 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:28:42,660 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 15:28:42,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 15:28:42,660 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:28:42,660 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:28:42,661 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:28:42,661 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:28:42,661 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:28:42,661 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:28:42,661 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:28:42,661 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:28:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 15:28:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 15:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:28:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:28:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:28:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:28:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:28:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:28:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 15:28:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 15:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:28:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:28:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 15:28:42,664 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 15:28:42,783 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:28:42,785 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:28:43,504 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:28:43,911 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:28:43,911 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:28:43,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:28:43 BoogieIcfgContainer [2022-12-14 15:28:43,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:28:43,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:28:43,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:28:43,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:28:43,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:28:41" (1/3) ... [2022-12-14 15:28:43,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37847fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:28:43, skipping insertion in model container [2022-12-14 15:28:43,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:28:42" (2/3) ... [2022-12-14 15:28:43,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37847fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:28:43, skipping insertion in model container [2022-12-14 15:28:43,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:28:43" (3/3) ... [2022-12-14 15:28:43,919 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2022-12-14 15:28:43,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:28:43,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:28:43,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:28:43,979 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;@78b22629, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:28:43,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:28:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-12-14 15:28:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:28:43,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:43,992 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] [2022-12-14 15:28:43,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -294007370, now seen corresponding path program 1 times [2022-12-14 15:28:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806549365] [2022-12-14 15:28:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:44,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:28:44,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806549365] [2022-12-14 15:28:44,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806549365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:44,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:44,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:28:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891493357] [2022-12-14 15:28:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:44,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:28:44,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:28:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:28:44,423 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) 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) [2022-12-14 15:28:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:44,760 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2022-12-14 15:28:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:28:44,763 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 [2022-12-14 15:28:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:44,777 INFO L225 Difference]: With dead ends: 1143 [2022-12-14 15:28:44,778 INFO L226 Difference]: Without dead ends: 755 [2022-12-14 15:28:44,784 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 [2022-12-14 15:28:44,786 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 577 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:44,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1254 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:28:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-12-14 15:28:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2022-12-14 15:28:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2022-12-14 15:28:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2022-12-14 15:28:44,900 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2022-12-14 15:28:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:44,912 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2022-12-14 15:28:44,912 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) [2022-12-14 15:28:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2022-12-14 15:28:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:28:44,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:44,922 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] [2022-12-14 15:28:44,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:28:44,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2008808769, now seen corresponding path program 1 times [2022-12-14 15:28:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560443028] [2022-12-14 15:28:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:28:45,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560443028] [2022-12-14 15:28:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560443028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:28:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897203184] [2022-12-14 15:28:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:45,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:28:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:28:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:28:45,358 INFO L87 Difference]: Start difference. First operand 719 states and 1125 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) [2022-12-14 15:28:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:47,091 INFO L93 Difference]: Finished difference Result 2315 states and 3667 transitions. [2022-12-14 15:28:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:28:47,092 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 [2022-12-14 15:28:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:47,107 INFO L225 Difference]: With dead ends: 2315 [2022-12-14 15:28:47,107 INFO L226 Difference]: Without dead ends: 1608 [2022-12-14 15:28:47,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:28:47,114 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1157 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:47,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1296 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2858 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 15:28:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-12-14 15:28:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1466. [2022-12-14 15:28:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1000 states have (on average 1.543) internal successors, (1543), 1051 states have internal predecessors, (1543), 364 states have call successors, (364), 99 states have call predecessors, (364), 101 states have return successors, (408), 342 states have call predecessors, (408), 360 states have call successors, (408) [2022-12-14 15:28:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2315 transitions. [2022-12-14 15:28:47,226 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2315 transitions. Word has length 87 [2022-12-14 15:28:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:47,226 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 2315 transitions. [2022-12-14 15:28:47,226 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) [2022-12-14 15:28:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2315 transitions. [2022-12-14 15:28:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 15:28:47,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:47,230 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] [2022-12-14 15:28:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:28:47,230 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 427255663, now seen corresponding path program 1 times [2022-12-14 15:28:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:47,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363825790] [2022-12-14 15:28:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:28:47,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363825790] [2022-12-14 15:28:47,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363825790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:47,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:47,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 15:28:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148446515] [2022-12-14 15:28:47,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:47,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 15:28:47,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:47,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 15:28:47,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:28:47,529 INFO L87 Difference]: Start difference. First operand 1466 states and 2315 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) [2022-12-14 15:28:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:49,550 INFO L93 Difference]: Finished difference Result 2140 states and 3420 transitions. [2022-12-14 15:28:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:28:49,551 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 [2022-12-14 15:28:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:49,565 INFO L225 Difference]: With dead ends: 2140 [2022-12-14 15:28:49,565 INFO L226 Difference]: Without dead ends: 2138 [2022-12-14 15:28:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:28:49,568 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1201 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3762 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 4498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 3762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:49,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 2134 Invalid, 4498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 3762 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:28:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-12-14 15:28:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1900. [2022-12-14 15:28:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1249 states have (on average 1.4971977582065652) internal successors, (1870), 1325 states have internal predecessors, (1870), 513 states have call successors, (513), 131 states have call predecessors, (513), 137 states have return successors, (581), 482 states have call predecessors, (581), 507 states have call successors, (581) [2022-12-14 15:28:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2964 transitions. [2022-12-14 15:28:49,711 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2964 transitions. Word has length 91 [2022-12-14 15:28:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:49,712 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 2964 transitions. [2022-12-14 15:28:49,712 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) [2022-12-14 15:28:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2964 transitions. [2022-12-14 15:28:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 15:28:49,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:49,717 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] [2022-12-14 15:28:49,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:28:49,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1932747785, now seen corresponding path program 1 times [2022-12-14 15:28:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:49,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755414531] [2022-12-14 15:28:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:28:49,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:49,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755414531] [2022-12-14 15:28:49,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755414531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:49,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141710840] [2022-12-14 15:28:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:49,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:49,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:49,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:49,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:28:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:28:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 15:28:50,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141710840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:50,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 15:28:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597428445] [2022-12-14 15:28:50,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:50,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:28:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:28:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:28:50,318 INFO L87 Difference]: Start difference. First operand 1900 states and 2964 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) [2022-12-14 15:28:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:50,859 INFO L93 Difference]: Finished difference Result 3787 states and 5941 transitions. [2022-12-14 15:28:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:28:50,860 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 [2022-12-14 15:28:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:50,869 INFO L225 Difference]: With dead ends: 3787 [2022-12-14 15:28:50,869 INFO L226 Difference]: Without dead ends: 1898 [2022-12-14 15:28:50,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:28:50,877 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 391 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:50,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2365 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:28:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-12-14 15:28:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2022-12-14 15:28:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2022-12-14 15:28:51,002 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 121 [2022-12-14 15:28:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:51,002 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2022-12-14 15:28:51,002 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) [2022-12-14 15:28:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2022-12-14 15:28:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 15:28:51,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:51,005 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] [2022-12-14 15:28:51,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:28:51,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 15:28:51,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -305423137, now seen corresponding path program 1 times [2022-12-14 15:28:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:51,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753613344] [2022-12-14 15:28:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:51,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:28:51,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753613344] [2022-12-14 15:28:51,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753613344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:51,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:51,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:28:51,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79552635] [2022-12-14 15:28:51,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:51,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:51,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:28:51,312 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 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) [2022-12-14 15:28:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:51,514 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2022-12-14 15:28:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:51,514 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 [2022-12-14 15:28:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:51,522 INFO L225 Difference]: With dead ends: 3878 [2022-12-14 15:28:51,522 INFO L226 Difference]: Without dead ends: 1994 [2022-12-14 15:28:51,530 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 [2022-12-14 15:28:51,530 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 30 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:51,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1657 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:28:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-12-14 15:28:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2022-12-14 15:28:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2022-12-14 15:28:51,613 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2022-12-14 15:28:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2022-12-14 15:28:51,613 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) [2022-12-14 15:28:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2022-12-14 15:28:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 15:28:51,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:51,616 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, 1, 1, 1, 1] [2022-12-14 15:28:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:28:51,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -845320533, now seen corresponding path program 1 times [2022-12-14 15:28:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823222909] [2022-12-14 15:28:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:51,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 15:28:51,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823222909] [2022-12-14 15:28:51,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823222909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95459203] [2022-12-14 15:28:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:51,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:51,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:28:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:28:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:28:52,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:52,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95459203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:52,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:52,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:28:52,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744546523] [2022-12-14 15:28:52,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:52,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:52,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:28:52,105 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 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) [2022-12-14 15:28:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:52,393 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2022-12-14 15:28:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:52,393 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 129 [2022-12-14 15:28:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:52,406 INFO L225 Difference]: With dead ends: 3960 [2022-12-14 15:28:52,406 INFO L226 Difference]: Without dead ends: 2064 [2022-12-14 15:28:52,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:28:52,419 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:52,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:28:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-12-14 15:28:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2022-12-14 15:28:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2022-12-14 15:28:52,555 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2022-12-14 15:28:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:52,555 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2022-12-14 15:28:52,555 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) [2022-12-14 15:28:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2022-12-14 15:28:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 15:28:52,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:52,561 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, 1, 1, 1, 1] [2022-12-14 15:28:52,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:28:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 15:28:52,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1716604052, now seen corresponding path program 1 times [2022-12-14 15:28:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:52,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204244486] [2022-12-14 15:28:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:52,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 15:28:52,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204244486] [2022-12-14 15:28:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204244486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920523814] [2022-12-14 15:28:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:52,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:52,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:52,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:28:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:28:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:28:53,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:53,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920523814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:53,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:53,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:28:53,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500502499] [2022-12-14 15:28:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:53,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:28:53,125 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 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) [2022-12-14 15:28:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:53,361 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2022-12-14 15:28:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:53,362 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 [2022-12-14 15:28:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:53,385 INFO L225 Difference]: With dead ends: 4272 [2022-12-14 15:28:53,385 INFO L226 Difference]: Without dead ends: 2220 [2022-12-14 15:28:53,393 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 [2022-12-14 15:28:53,394 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:53,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:28:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-12-14 15:28:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2022-12-14 15:28:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2022-12-14 15:28:53,501 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2022-12-14 15:28:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:53,502 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2022-12-14 15:28:53,502 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) [2022-12-14 15:28:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2022-12-14 15:28:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 15:28:53,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:53,505 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, 1, 1, 1, 1] [2022-12-14 15:28:53,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:28:53,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:53,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1452530940, now seen corresponding path program 1 times [2022-12-14 15:28:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504809427] [2022-12-14 15:28:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:53,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:28:53,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504809427] [2022-12-14 15:28:53,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504809427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530697605] [2022-12-14 15:28:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:53,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:53,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:53,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:28:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:54,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:28:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:28:54,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:54,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530697605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:54,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:54,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:28:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957747523] [2022-12-14 15:28:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:28:54,094 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 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) [2022-12-14 15:28:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:54,335 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2022-12-14 15:28:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:54,335 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 138 [2022-12-14 15:28:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:54,344 INFO L225 Difference]: With dead ends: 4584 [2022-12-14 15:28:54,344 INFO L226 Difference]: Without dead ends: 2376 [2022-12-14 15:28:54,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:28:54,352 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:54,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:28:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-12-14 15:28:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2022-12-14 15:28:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2022-12-14 15:28:54,433 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2022-12-14 15:28:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:54,433 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2022-12-14 15:28:54,433 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) [2022-12-14 15:28:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2022-12-14 15:28:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 15:28:54,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:54,437 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, 1, 1, 1, 1] [2022-12-14 15:28:54,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:28:54,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:54,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1094892725, now seen corresponding path program 1 times [2022-12-14 15:28:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:54,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163783694] [2022-12-14 15:28:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:28:54,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163783694] [2022-12-14 15:28:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163783694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:28:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325094429] [2022-12-14 15:28:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:28:54,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:28:54,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:28:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:28:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:28:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:28:54,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:28:54,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325094429] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:54,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:28:54,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:28:54,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811343063] [2022-12-14 15:28:54,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:54,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:54,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:28:54,991 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2022-12-14 15:28:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:55,224 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2022-12-14 15:28:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 141 [2022-12-14 15:28:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:55,234 INFO L225 Difference]: With dead ends: 4896 [2022-12-14 15:28:55,234 INFO L226 Difference]: Without dead ends: 2532 [2022-12-14 15:28:55,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:28:55,242 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:55,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:28:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-12-14 15:28:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2022-12-14 15:28:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2022-12-14 15:28:55,363 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2022-12-14 15:28:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:55,364 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2022-12-14 15:28:55,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2022-12-14 15:28:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2022-12-14 15:28:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:28:55,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:55,370 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] [2022-12-14 15:28:55,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:28:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:28:55,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash 300226171, now seen corresponding path program 1 times [2022-12-14 15:28:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12038290] [2022-12-14 15:28:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:28:55,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12038290] [2022-12-14 15:28:55,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12038290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:55,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:55,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:28:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115857192] [2022-12-14 15:28:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:55,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:28:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:28:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:28:55,666 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 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, (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) [2022-12-14 15:28:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:55,944 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2022-12-14 15:28:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:28:55,944 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, (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 143 [2022-12-14 15:28:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:55,954 INFO L225 Difference]: With dead ends: 5220 [2022-12-14 15:28:55,954 INFO L226 Difference]: Without dead ends: 2668 [2022-12-14 15:28:55,962 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 [2022-12-14 15:28:55,962 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:55,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:28:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-12-14 15:28:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2022-12-14 15:28:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:28:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2022-12-14 15:28:56,075 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2022-12-14 15:28:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:56,075 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2022-12-14 15:28:56,076 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, (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) [2022-12-14 15:28:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2022-12-14 15:28:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:28:56,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:56,079 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, 1, 1, 1, 1] [2022-12-14 15:28:56,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:28:56,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1328009834, now seen corresponding path program 1 times [2022-12-14 15:28:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505288952] [2022-12-14 15:28:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:28:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:28:56,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:28:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505288952] [2022-12-14 15:28:56,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505288952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:28:56,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:28:56,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:28:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57598083] [2022-12-14 15:28:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:28:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:28:56,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:28:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:28:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:28:56,252 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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) [2022-12-14 15:28:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:28:58,485 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2022-12-14 15:28:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:28:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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 143 [2022-12-14 15:28:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:28:58,503 INFO L225 Difference]: With dead ends: 6865 [2022-12-14 15:28:58,503 INFO L226 Difference]: Without dead ends: 3844 [2022-12-14 15:28:58,512 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 [2022-12-14 15:28:58,512 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 1673 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 5451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:28:58,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 2015 Invalid, 5451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 15:28:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-12-14 15:28:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2022-12-14 15:28:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2022-12-14 15:28:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2022-12-14 15:28:58,670 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2022-12-14 15:28:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:28:58,670 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2022-12-14 15:28:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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) [2022-12-14 15:28:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2022-12-14 15:28:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:28:58,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:28:58,674 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, 1, 1, 1, 1] [2022-12-14 15:28:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:28:58,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:28:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:28:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2013940404, now seen corresponding path program 1 times [2022-12-14 15:28:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:28:58,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109235561] [2022-12-14 15:28:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:28:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:28:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 15:29:01,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109235561] [2022-12-14 15:29:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109235561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675129800] [2022-12-14 15:29:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:01,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:01,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:01,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:29:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 15:29:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 15:29:02,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:29,939 WARN L233 SmtUtils]: Spent 25.16s 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) [2022-12-14 15:29:56,628 WARN L233 SmtUtils]: Spent 25.62s 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) [2022-12-14 15:29:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 15:29:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675129800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173928823] [2022-12-14 15:29:57,927 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-12-14 15:29:57,927 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:29:57,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:29:57,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:29:57,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:29:59,852 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 15:30:04,544 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-12-14 15:30:27,153 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 511 for LOIs [2022-12-14 15:30:30,244 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 506 for LOIs [2022-12-14 15:30:30,420 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 503 for LOIs [2022-12-14 15:30:31,547 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 459 for LOIs [2022-12-14 15:30:31,654 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2022-12-14 15:30:31,656 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 15:30:35,005 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 15:30:35,584 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 15:30:35,727 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 444 for LOIs [2022-12-14 15:30:36,832 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 47 for LOIs [2022-12-14 15:30:36,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:33:43,436 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 709 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:33:51,310 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 733 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:33:57,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93876#(and (= |old(~floorButtons_2~0)| 0) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~1#1|) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (= |old(~persons_5~0)| 0) (<= 1 |timeShift_~tmp~23#1|) (= |old(~doorState~0)| 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1|) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= ~floorButtons_0~0 0) (= |old(~blocked~0)| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (= ~persons_4~0 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_~tmp~23#1| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (= ~doorState~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= 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) (<= |timeShift_isExecutiveFloor_~retValue_acc~20#1| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~20#1| |timeShift_isExecutiveFloor_#res#1|) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-12-14 15:33:57,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:33:57,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:33:57,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 16, 16] total 68 [2022-12-14 15:33:57,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902619432] [2022-12-14 15:33:57,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:33:57,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 15:33:57,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:33:57,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 15:33:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=16782, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 15:33:57,542 INFO L87 Difference]: Start difference. First operand 3666 states and 5655 transitions. Second operand has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2022-12-14 15:37:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:15,616 INFO L93 Difference]: Finished difference Result 37426 states and 64235 transitions. [2022-12-14 15:37:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2022-12-14 15:37:15,617 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) Word has length 144 [2022-12-14 15:37:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:15,755 INFO L225 Difference]: With dead ends: 37426 [2022-12-14 15:37:15,755 INFO L226 Difference]: Without dead ends: 29299 [2022-12-14 15:37:15,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1278 GetRequests, 397 SyntacticMatches, 25 SemanticMatches, 856 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319505 ImplicationChecksByTransitivity, 315.2s TimeCoverageRelationStatistics Valid=40594, Invalid=694712, Unknown=0, NotChecked=0, Total=735306 [2022-12-14 15:37:15,898 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 30544 mSDsluCounter, 21970 mSDsCounter, 0 mSdLazyCounter, 145429 mSolverCounterSat, 27124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30592 SdHoareTripleChecker+Valid, 22751 SdHoareTripleChecker+Invalid, 172553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 27124 IncrementalHoareTripleChecker+Valid, 145429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30592 Valid, 22751 Invalid, 172553 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [27124 Valid, 145429 Invalid, 0 Unknown, 0 Unchecked, 79.0s Time] [2022-12-14 15:37:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29299 states. [2022-12-14 15:37:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29299 to 21353. [2022-12-14 15:37:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21353 states, 16779 states have (on average 1.4706478336015256) internal successors, (24676), 17544 states have internal predecessors, (24676), 3152 states have call successors, (3152), 1136 states have call predecessors, (3152), 1421 states have return successors, (4304), 2880 states have call predecessors, (4304), 3144 states have call successors, (4304) [2022-12-14 15:37:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 32132 transitions. [2022-12-14 15:37:17,925 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 32132 transitions. Word has length 144 [2022-12-14 15:37:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:17,926 INFO L495 AbstractCegarLoop]: Abstraction has 21353 states and 32132 transitions. [2022-12-14 15:37:17,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 51 states have (on average 4.078431372549019) internal successors, (208), 53 states have internal predecessors, (208), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2022-12-14 15:37:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 32132 transitions. [2022-12-14 15:37:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 15:37:17,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:17,940 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, 1, 1, 1, 1, 1] [2022-12-14 15:37:17,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:37:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:37:18,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:18,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2136513865, now seen corresponding path program 1 times [2022-12-14 15:37:18,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:18,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397542754] [2022-12-14 15:37:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 15:37:18,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397542754] [2022-12-14 15:37:18,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397542754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853775402] [2022-12-14 15:37:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:18,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:18,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:18,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:18,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:37:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:37:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 15:37:18,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:18,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853775402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:18,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:18,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-12-14 15:37:18,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489800673] [2022-12-14 15:37:18,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:37:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:37:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:37:18,912 INFO L87 Difference]: Start difference. First operand 21353 states and 32132 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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) [2022-12-14 15:37:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:24,296 INFO L93 Difference]: Finished difference Result 46289 states and 70463 transitions. [2022-12-14 15:37:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:37:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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 150 [2022-12-14 15:37:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:24,373 INFO L225 Difference]: With dead ends: 46289 [2022-12-14 15:37:24,373 INFO L226 Difference]: Without dead ends: 25003 [2022-12-14 15:37:24,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:37:24,439 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1543 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 5943 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 5943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:24,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1730 Valid, 1652 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 5943 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 15:37:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25003 states. [2022-12-14 15:37:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25003 to 24089. [2022-12-14 15:37:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24089 states, 19199 states have (on average 1.470128652533986) internal successors, (28225), 20000 states have internal predecessors, (28225), 3307 states have call successors, (3307), 1260 states have call predecessors, (3307), 1582 states have return successors, (4670), 3032 states have call predecessors, (4670), 3297 states have call successors, (4670) [2022-12-14 15:37:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24089 states to 24089 states and 36202 transitions. [2022-12-14 15:37:26,241 INFO L78 Accepts]: Start accepts. Automaton has 24089 states and 36202 transitions. Word has length 150 [2022-12-14 15:37:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:26,242 INFO L495 AbstractCegarLoop]: Abstraction has 24089 states and 36202 transitions. [2022-12-14 15:37:26,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 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) [2022-12-14 15:37:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24089 states and 36202 transitions. [2022-12-14 15:37:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 15:37:26,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:26,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:37:26,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:37:26,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:37:26,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 109920665, now seen corresponding path program 1 times [2022-12-14 15:37:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887144729] [2022-12-14 15:37:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 15:37:26,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887144729] [2022-12-14 15:37:26,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887144729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671357469] [2022-12-14 15:37:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:26,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:26,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:26,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:37:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:37:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 15:37:27,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:27,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671357469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:27,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:27,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-12-14 15:37:27,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708084677] [2022-12-14 15:37:27,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:37:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:37:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:37:27,309 INFO L87 Difference]: Start difference. First operand 24089 states and 36202 transitions. Second operand has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:37:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:30,929 INFO L93 Difference]: Finished difference Result 35520 states and 53477 transitions. [2022-12-14 15:37:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:37:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 215 [2022-12-14 15:37:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:30,978 INFO L225 Difference]: With dead ends: 35520 [2022-12-14 15:37:30,978 INFO L226 Difference]: Without dead ends: 17367 [2022-12-14 15:37:31,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-12-14 15:37:31,006 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1334 mSDsluCounter, 3076 mSDsCounter, 0 mSdLazyCounter, 3934 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 4230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 3934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:31,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 3930 Invalid, 4230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 3934 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 15:37:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2022-12-14 15:37:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 17050. [2022-12-14 15:37:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17050 states, 12998 states have (on average 1.4556854900753962) internal successors, (18921), 13583 states have internal predecessors, (18921), 2802 states have call successors, (2802), 1078 states have call predecessors, (2802), 1249 states have return successors, (3865), 2559 states have call predecessors, (3865), 2792 states have call successors, (3865) [2022-12-14 15:37:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17050 states to 17050 states and 25588 transitions. [2022-12-14 15:37:32,362 INFO L78 Accepts]: Start accepts. Automaton has 17050 states and 25588 transitions. Word has length 215 [2022-12-14 15:37:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:32,362 INFO L495 AbstractCegarLoop]: Abstraction has 17050 states and 25588 transitions. [2022-12-14 15:37:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:37:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17050 states and 25588 transitions. [2022-12-14 15:37:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-12-14 15:37:32,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:32,384 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:37:32,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 15:37:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:32,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1882833648, now seen corresponding path program 1 times [2022-12-14 15:37:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:32,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548913226] [2022-12-14 15:37:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-12-14 15:37:32,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548913226] [2022-12-14 15:37:32,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548913226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968554232] [2022-12-14 15:37:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:32,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:32,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:32,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:37:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:37:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-12-14 15:37:33,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968554232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 15:37:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337766997] [2022-12-14 15:37:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:37:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:37:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:37:33,489 INFO L87 Difference]: Start difference. First operand 17050 states and 25588 transitions. Second operand has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 15:37:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:37,265 INFO L93 Difference]: Finished difference Result 28799 states and 43190 transitions. [2022-12-14 15:37:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:37:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 284 [2022-12-14 15:37:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:37,314 INFO L225 Difference]: With dead ends: 28799 [2022-12-14 15:37:37,314 INFO L226 Difference]: Without dead ends: 17245 [2022-12-14 15:37:37,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:37:37,337 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 1339 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 3851 SdHoareTripleChecker+Invalid, 4281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:37,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 3851 Invalid, 4281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 15:37:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17245 states. [2022-12-14 15:37:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17245 to 16746. [2022-12-14 15:37:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16746 states, 12694 states have (on average 1.445801165905152) internal successors, (18353), 13279 states have internal predecessors, (18353), 2802 states have call successors, (2802), 1078 states have call predecessors, (2802), 1249 states have return successors, (3865), 2559 states have call predecessors, (3865), 2792 states have call successors, (3865) [2022-12-14 15:37:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 25020 transitions. [2022-12-14 15:37:38,688 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 25020 transitions. Word has length 284 [2022-12-14 15:37:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:38,689 INFO L495 AbstractCegarLoop]: Abstraction has 16746 states and 25020 transitions. [2022-12-14 15:37:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 15:37:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 25020 transitions. [2022-12-14 15:37:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-12-14 15:37:38,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:38,710 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, 1, 1, 1, 1, 1] [2022-12-14 15:37:38,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:37:38,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:37:38,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash 865650048, now seen corresponding path program 1 times [2022-12-14 15:37:38,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:38,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123216764] [2022-12-14 15:37:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:38,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 15:37:39,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123216764] [2022-12-14 15:37:39,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123216764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034320054] [2022-12-14 15:37:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:39,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:39,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:39,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:37:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:37:39,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 15:37:39,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:39,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034320054] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:39,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:39,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:37:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782083696] [2022-12-14 15:37:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:37:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:37:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:37:39,549 INFO L87 Difference]: Start difference. First operand 16746 states and 25020 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:37:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:41,429 INFO L93 Difference]: Finished difference Result 33476 states and 50460 transitions. [2022-12-14 15:37:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:37:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2022-12-14 15:37:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:41,482 INFO L225 Difference]: With dead ends: 33476 [2022-12-14 15:37:41,482 INFO L226 Difference]: Without dead ends: 16706 [2022-12-14 15:37:41,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:37:41,528 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 192 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:41,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1446 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:37:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16706 states. [2022-12-14 15:37:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16706 to 16706. [2022-12-14 15:37:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16706 states, 12658 states have (on average 1.4001422025596462) internal successors, (17723), 13239 states have internal predecessors, (17723), 2802 states have call successors, (2802), 1078 states have call predecessors, (2802), 1245 states have return successors, (3859), 2559 states have call predecessors, (3859), 2792 states have call successors, (3859) [2022-12-14 15:37:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16706 states to 16706 states and 24384 transitions. [2022-12-14 15:37:42,889 INFO L78 Accepts]: Start accepts. Automaton has 16706 states and 24384 transitions. Word has length 231 [2022-12-14 15:37:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:42,889 INFO L495 AbstractCegarLoop]: Abstraction has 16706 states and 24384 transitions. [2022-12-14 15:37:42,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:37:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 16706 states and 24384 transitions. [2022-12-14 15:37:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-12-14 15:37:42,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:42,911 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:37:42,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:37:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:37:43,113 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash -3383070, now seen corresponding path program 1 times [2022-12-14 15:37:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:43,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287058902] [2022-12-14 15:37:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-14 15:37:43,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287058902] [2022-12-14 15:37:43,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287058902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:43,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856978458] [2022-12-14 15:37:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:43,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:43,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:43,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:37:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:43,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:37:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 15:37:43,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:43,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856978458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:43,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:43,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-12-14 15:37:43,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446690305] [2022-12-14 15:37:43,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:37:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:37:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:37:43,980 INFO L87 Difference]: Start difference. First operand 16706 states and 24384 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 15:37:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:49,774 INFO L93 Difference]: Finished difference Result 45736 states and 68166 transitions. [2022-12-14 15:37:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:37:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 232 [2022-12-14 15:37:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:49,886 INFO L225 Difference]: With dead ends: 45736 [2022-12-14 15:37:49,887 INFO L226 Difference]: Without dead ends: 28773 [2022-12-14 15:37:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:37:49,942 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 2408 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 4620 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 4620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:49,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1386 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 4620 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 15:37:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28773 states. [2022-12-14 15:37:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28773 to 27352. [2022-12-14 15:37:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27352 states, 20212 states have (on average 1.402978428656244) internal successors, (28357), 21274 states have internal predecessors, (28357), 5236 states have call successors, (5236), 1629 states have call predecessors, (5236), 1903 states have return successors, (7039), 4752 states have call predecessors, (7039), 5221 states have call successors, (7039) [2022-12-14 15:37:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27352 states to 27352 states and 40632 transitions. [2022-12-14 15:37:52,614 INFO L78 Accepts]: Start accepts. Automaton has 27352 states and 40632 transitions. Word has length 232 [2022-12-14 15:37:52,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:52,614 INFO L495 AbstractCegarLoop]: Abstraction has 27352 states and 40632 transitions. [2022-12-14 15:37:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 7 states have internal predecessors, (101), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 15:37:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27352 states and 40632 transitions. [2022-12-14 15:37:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-12-14 15:37:52,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:52,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:37:52,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:37:52,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:37:52,841 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash 137804029, now seen corresponding path program 1 times [2022-12-14 15:37:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540712500] [2022-12-14 15:37:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-12-14 15:37:53,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540712500] [2022-12-14 15:37:53,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540712500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824676930] [2022-12-14 15:37:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:53,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:53,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:53,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:37:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:37:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 15:37:53,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824676930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:53,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:53,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-12-14 15:37:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044046990] [2022-12-14 15:37:53,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:37:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:37:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:37:53,634 INFO L87 Difference]: Start difference. First operand 27352 states and 40632 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:37:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:58,511 INFO L93 Difference]: Finished difference Result 45523 states and 67704 transitions. [2022-12-14 15:37:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:37:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 223 [2022-12-14 15:37:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:58,608 INFO L225 Difference]: With dead ends: 45523 [2022-12-14 15:37:58,608 INFO L226 Difference]: Without dead ends: 27635 [2022-12-14 15:37:58,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-12-14 15:37:58,660 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1430 mSDsluCounter, 2808 mSDsCounter, 0 mSdLazyCounter, 3896 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 3615 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 3896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:58,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 3615 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 3896 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:37:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27635 states. [2022-12-14 15:38:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27635 to 26937. [2022-12-14 15:38:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26937 states, 19797 states have (on average 1.396373187856746) internal successors, (27644), 20859 states have internal predecessors, (27644), 5236 states have call successors, (5236), 1629 states have call predecessors, (5236), 1903 states have return successors, (7039), 4752 states have call predecessors, (7039), 5221 states have call successors, (7039) [2022-12-14 15:38:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26937 states to 26937 states and 39919 transitions. [2022-12-14 15:38:01,314 INFO L78 Accepts]: Start accepts. Automaton has 26937 states and 39919 transitions. Word has length 223 [2022-12-14 15:38:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:01,314 INFO L495 AbstractCegarLoop]: Abstraction has 26937 states and 39919 transitions. [2022-12-14 15:38:01,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:38:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26937 states and 39919 transitions. [2022-12-14 15:38:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-12-14 15:38:01,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:01,338 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, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:01,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:38:01,540 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1426403191, now seen corresponding path program 1 times [2022-12-14 15:38:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:01,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654095590] [2022-12-14 15:38:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-12-14 15:38:01,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654095590] [2022-12-14 15:38:01,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654095590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572059019] [2022-12-14 15:38:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:01,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:01,746 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:38:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:02,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:38:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-14 15:38:02,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:02,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572059019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:02,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:02,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509756830] [2022-12-14 15:38:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:02,065 INFO L87 Difference]: Start difference. First operand 26937 states and 39919 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:04,973 INFO L93 Difference]: Finished difference Result 54102 states and 80603 transitions. [2022-12-14 15:38:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:04,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2022-12-14 15:38:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:05,070 INFO L225 Difference]: With dead ends: 54102 [2022-12-14 15:38:05,071 INFO L226 Difference]: Without dead ends: 26937 [2022-12-14 15:38:05,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:05,158 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 135 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:05,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1459 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26937 states. [2022-12-14 15:38:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26937 to 25794. [2022-12-14 15:38:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 18792 states have (on average 1.3439229459344402) internal successors, (25255), 19845 states have internal predecessors, (25255), 5149 states have call successors, (5149), 1587 states have call predecessors, (5149), 1852 states have return successors, (6928), 4665 states have call predecessors, (6928), 5134 states have call successors, (6928) [2022-12-14 15:38:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 37332 transitions. [2022-12-14 15:38:08,074 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 37332 transitions. Word has length 231 [2022-12-14 15:38:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:08,074 INFO L495 AbstractCegarLoop]: Abstraction has 25794 states and 37332 transitions. [2022-12-14 15:38:08,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 37332 transitions. [2022-12-14 15:38:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-12-14 15:38:08,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:08,097 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:08,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:38:08,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:08,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1426271643, now seen corresponding path program 1 times [2022-12-14 15:38:08,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:08,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626418477] [2022-12-14 15:38:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:08,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-12-14 15:38:08,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626418477] [2022-12-14 15:38:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626418477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822371849] [2022-12-14 15:38:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:08,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:08,509 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:08,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:38:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:38:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-14 15:38:08,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:08,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822371849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:08,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:08,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956013464] [2022-12-14 15:38:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:08,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:08,930 INFO L87 Difference]: Start difference. First operand 25794 states and 37332 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:11,862 INFO L93 Difference]: Finished difference Result 51654 states and 75166 transitions. [2022-12-14 15:38:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2022-12-14 15:38:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:11,946 INFO L225 Difference]: With dead ends: 51654 [2022-12-14 15:38:11,946 INFO L226 Difference]: Without dead ends: 25794 [2022-12-14 15:38:12,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:12,019 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 136 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:12,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1459 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25794 states. [2022-12-14 15:38:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25794 to 25746. [2022-12-14 15:38:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25746 states, 18752 states have (on average 1.3219389931740615) internal successors, (24789), 19805 states have internal predecessors, (24789), 5144 states have call successors, (5144), 1584 states have call predecessors, (5144), 1849 states have return successors, (6923), 4660 states have call predecessors, (6923), 5129 states have call successors, (6923) [2022-12-14 15:38:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25746 states to 25746 states and 36856 transitions. [2022-12-14 15:38:14,580 INFO L78 Accepts]: Start accepts. Automaton has 25746 states and 36856 transitions. Word has length 231 [2022-12-14 15:38:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:14,581 INFO L495 AbstractCegarLoop]: Abstraction has 25746 states and 36856 transitions. [2022-12-14 15:38:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 25746 states and 36856 transitions. [2022-12-14 15:38:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-12-14 15:38:14,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:14,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:14,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:14,806 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1495235913, now seen corresponding path program 1 times [2022-12-14 15:38:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:14,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232548214] [2022-12-14 15:38:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-12-14 15:38:14,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:14,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232548214] [2022-12-14 15:38:15,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232548214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:15,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144689176] [2022-12-14 15:38:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:15,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:15,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:15,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:38:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:38:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 15:38:15,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144689176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:15,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886137527] [2022-12-14 15:38:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:15,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:15,372 INFO L87 Difference]: Start difference. First operand 25746 states and 36856 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:18,538 INFO L93 Difference]: Finished difference Result 51424 states and 74001 transitions. [2022-12-14 15:38:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 231 [2022-12-14 15:38:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:18,636 INFO L225 Difference]: With dead ends: 51424 [2022-12-14 15:38:18,636 INFO L226 Difference]: Without dead ends: 25746 [2022-12-14 15:38:18,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:18,721 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 137 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:18,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1459 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25746 states. [2022-12-14 15:38:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25746 to 25746. [2022-12-14 15:38:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25746 states, 18752 states have (on average 1.31383319112628) internal successors, (24637), 19805 states have internal predecessors, (24637), 5144 states have call successors, (5144), 1584 states have call predecessors, (5144), 1849 states have return successors, (6923), 4660 states have call predecessors, (6923), 5129 states have call successors, (6923) [2022-12-14 15:38:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25746 states to 25746 states and 36704 transitions. [2022-12-14 15:38:21,286 INFO L78 Accepts]: Start accepts. Automaton has 25746 states and 36704 transitions. Word has length 231 [2022-12-14 15:38:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:21,286 INFO L495 AbstractCegarLoop]: Abstraction has 25746 states and 36704 transitions. [2022-12-14 15:38:21,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25746 states and 36704 transitions. [2022-12-14 15:38:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-12-14 15:38:21,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:21,310 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:21,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:38:21,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:21,512 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:21,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1462834137, now seen corresponding path program 1 times [2022-12-14 15:38:21,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17982189] [2022-12-14 15:38:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-12-14 15:38:21,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17982189] [2022-12-14 15:38:21,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17982189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940597901] [2022-12-14 15:38:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:21,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:21,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:21,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:38:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-12-14 15:38:22,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940597901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:22,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-12-14 15:38:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805390820] [2022-12-14 15:38:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:22,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:38:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:38:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:38:22,395 INFO L87 Difference]: Start difference. First operand 25746 states and 36704 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:38:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:27,358 INFO L93 Difference]: Finished difference Result 42746 states and 60945 transitions. [2022-12-14 15:38:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:38:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 287 [2022-12-14 15:38:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:27,452 INFO L225 Difference]: With dead ends: 42746 [2022-12-14 15:38:27,452 INFO L226 Difference]: Without dead ends: 25987 [2022-12-14 15:38:27,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-12-14 15:38:27,501 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1304 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 4120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:27,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 3603 Invalid, 4120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:38:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25987 states. [2022-12-14 15:38:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25987 to 25331. [2022-12-14 15:38:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25331 states, 18337 states have (on average 1.3131919070731308) internal successors, (24080), 19390 states have internal predecessors, (24080), 5144 states have call successors, (5144), 1584 states have call predecessors, (5144), 1849 states have return successors, (6923), 4660 states have call predecessors, (6923), 5129 states have call successors, (6923) [2022-12-14 15:38:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 36147 transitions. [2022-12-14 15:38:30,077 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 36147 transitions. Word has length 287 [2022-12-14 15:38:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:30,077 INFO L495 AbstractCegarLoop]: Abstraction has 25331 states and 36147 transitions. [2022-12-14 15:38:30,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:38:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 36147 transitions. [2022-12-14 15:38:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-12-14 15:38:30,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:30,099 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, 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, 1, 1, 1, 1] [2022-12-14 15:38:30,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:38:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:38:30,302 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2009581234, now seen corresponding path program 1 times [2022-12-14 15:38:30,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:30,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931631860] [2022-12-14 15:38:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-12-14 15:38:30,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931631860] [2022-12-14 15:38:30,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931631860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375620533] [2022-12-14 15:38:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:30,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:30,504 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:30,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:38:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:30,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:38:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 15:38:30,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:30,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375620533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:30,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:30,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548242970] [2022-12-14 15:38:30,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:30,913 INFO L87 Difference]: Start difference. First operand 25331 states and 36147 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:33,865 INFO L93 Difference]: Finished difference Result 50230 states and 72142 transitions. [2022-12-14 15:38:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 233 [2022-12-14 15:38:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:33,957 INFO L225 Difference]: With dead ends: 50230 [2022-12-14 15:38:33,957 INFO L226 Difference]: Without dead ends: 24559 [2022-12-14 15:38:34,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:34,040 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 159 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1446 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:38:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24559 states. [2022-12-14 15:38:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24559 to 24322. [2022-12-14 15:38:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24322 states, 17413 states have (on average 1.304714868201918) internal successors, (22719), 18452 states have internal predecessors, (22719), 5095 states have call successors, (5095), 1562 states have call predecessors, (5095), 1813 states have return successors, (6842), 4611 states have call predecessors, (6842), 5080 states have call successors, (6842) [2022-12-14 15:38:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24322 states to 24322 states and 34656 transitions. [2022-12-14 15:38:36,567 INFO L78 Accepts]: Start accepts. Automaton has 24322 states and 34656 transitions. Word has length 233 [2022-12-14 15:38:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:36,567 INFO L495 AbstractCegarLoop]: Abstraction has 24322 states and 34656 transitions. [2022-12-14 15:38:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 24322 states and 34656 transitions. [2022-12-14 15:38:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-12-14 15:38:36,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:36,589 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, 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, 1, 1, 1, 1] [2022-12-14 15:38:36,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 15:38:36,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 15:38:36,791 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1364723501, now seen corresponding path program 1 times [2022-12-14 15:38:36,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:36,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805658065] [2022-12-14 15:38:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-14 15:38:36,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805658065] [2022-12-14 15:38:36,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805658065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255079430] [2022-12-14 15:38:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:36,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:36,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:36,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 15:38:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:38:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-14 15:38:37,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255079430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:37,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:37,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:37,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827233891] [2022-12-14 15:38:37,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:37,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:37,367 INFO L87 Difference]: Start difference. First operand 24322 states and 34656 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:40,014 INFO L93 Difference]: Finished difference Result 48634 states and 69710 transitions. [2022-12-14 15:38:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 234 [2022-12-14 15:38:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:40,186 INFO L225 Difference]: With dead ends: 48634 [2022-12-14 15:38:40,186 INFO L226 Difference]: Without dead ends: 23821 [2022-12-14 15:38:40,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:40,248 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 155 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:40,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1446 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:38:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2022-12-14 15:38:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 23818. [2022-12-14 15:38:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23818 states, 16918 states have (on average 1.3046459392363163) internal successors, (22072), 17949 states have internal predecessors, (22072), 5094 states have call successors, (5094), 1562 states have call predecessors, (5094), 1805 states have return successors, (6825), 4610 states have call predecessors, (6825), 5079 states have call successors, (6825) [2022-12-14 15:38:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23818 states to 23818 states and 33991 transitions. [2022-12-14 15:38:42,755 INFO L78 Accepts]: Start accepts. Automaton has 23818 states and 33991 transitions. Word has length 234 [2022-12-14 15:38:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:42,755 INFO L495 AbstractCegarLoop]: Abstraction has 23818 states and 33991 transitions. [2022-12-14 15:38:42,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 23818 states and 33991 transitions. [2022-12-14 15:38:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-14 15:38:42,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:42,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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, 1, 1, 1, 1] [2022-12-14 15:38:42,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 15:38:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:42,982 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash -568255096, now seen corresponding path program 1 times [2022-12-14 15:38:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:42,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618638443] [2022-12-14 15:38:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 15:38:43,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618638443] [2022-12-14 15:38:43,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618638443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142575202] [2022-12-14 15:38:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:43,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:43,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:38:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:38:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-14 15:38:43,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:43,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142575202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:43,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:43,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:38:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195678269] [2022-12-14 15:38:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:43,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:38:43,474 INFO L87 Difference]: Start difference. First operand 23818 states and 33991 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:46,061 INFO L93 Difference]: Finished difference Result 46966 states and 67522 transitions. [2022-12-14 15:38:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 235 [2022-12-14 15:38:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:46,161 INFO L225 Difference]: With dead ends: 46966 [2022-12-14 15:38:46,161 INFO L226 Difference]: Without dead ends: 22655 [2022-12-14 15:38:46,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:38:46,252 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 151 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:46,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1446 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:38:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22655 states. [2022-12-14 15:38:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22655 to 22652. [2022-12-14 15:38:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22652 states, 15848 states have (on average 1.3093134780413933) internal successors, (20750), 16859 states have internal predecessors, (20750), 5041 states have call successors, (5041), 1539 states have call predecessors, (5041), 1762 states have return successors, (6724), 4557 states have call predecessors, (6724), 5026 states have call successors, (6724) [2022-12-14 15:38:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22652 states to 22652 states and 32515 transitions. [2022-12-14 15:38:48,805 INFO L78 Accepts]: Start accepts. Automaton has 22652 states and 32515 transitions. Word has length 235 [2022-12-14 15:38:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:48,805 INFO L495 AbstractCegarLoop]: Abstraction has 22652 states and 32515 transitions. [2022-12-14 15:38:48,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 15:38:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22652 states and 32515 transitions. [2022-12-14 15:38:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-12-14 15:38:48,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:48,826 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:38:48,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 15:38:49,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:49,030 INFO L85 PathProgramCache]: Analyzing trace with hash 499197121, now seen corresponding path program 1 times [2022-12-14 15:38:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:49,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273172966] [2022-12-14 15:38:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 15:38:49,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:49,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273172966] [2022-12-14 15:38:49,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273172966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:49,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68970700] [2022-12-14 15:38:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:49,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:49,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:49,209 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:49,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:38:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 15:38:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 3 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 15:38:49,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:38:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 15:38:50,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68970700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:38:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094000912] [2022-12-14 15:38:50,768 INFO L159 IcfgInterpreter]: Started Sifa with 131 locations of interest [2022-12-14 15:38:50,768 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:38:50,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:38:50,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:38:50,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:38:57,597 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 572 for LOIs [2022-12-14 15:38:58,065 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-12-14 15:38:58,351 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 183 for LOIs [2022-12-14 15:38:59,817 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 38 for LOIs [2022-12-14 15:38:59,821 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 66 for LOIs [2022-12-14 15:38:59,831 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 15:38:59,920 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 59 for LOIs [2022-12-14 15:39:00,104 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-12-14 15:39:00,106 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 15:39:03,460 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 41 for LOIs [2022-12-14 15:39:03,471 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 40 for LOIs [2022-12-14 15:39:03,481 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 35 for LOIs [2022-12-14 15:39:03,588 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-12-14 15:39:03,599 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 35 for LOIs [2022-12-14 15:39:03,607 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 525 for LOIs [2022-12-14 15:39:05,877 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 798 for LOIs [2022-12-14 15:39:10,037 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 651 for LOIs [2022-12-14 15:39:10,522 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:39:21,230 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 651 DAG size of output: 523 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:27,997 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 691 DAG size of output: 537 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:45,414 WARN L233 SmtUtils]: Spent 9.62s on a formula simplification. DAG size of input: 798 DAG size of output: 732 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:39:55,905 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 793 DAG size of output: 792 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:40:41,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328217#(and (<= |old(~doorState~0)| 2147483647) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~1#1|) (= ~executiveFloor~0 4) (< ~maximumWeight~0 ~weight~0) (<= 0 |old(~weight~0)|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~20#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (= ~blocked~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~9#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ ~doorState~0 2147483648)) (<= 0 |old(~blocked~0)|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (= ~doorState~0 |timeShift_~tmp~23#1|) (<= |old(~blocked~0)| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= |timeShift_isExecutiveFloor_~retValue_acc~20#1| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~20#1| |timeShift_isExecutiveFloor_#res#1|) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (not (= |timeShift_~tmp~23#1| 0)) (= ~cleanupTimeShifts~0 12) (<= |timeShift_~tmp~23#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 15:40:41,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:40:41,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:40:41,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 8] total 18 [2022-12-14 15:40:41,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904009443] [2022-12-14 15:40:41,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:40:41,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 15:40:41,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:41,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 15:40:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=8451, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 15:40:41,485 INFO L87 Difference]: Start difference. First operand 22652 states and 32515 transitions. Second operand has 18 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 11 states have call successors, (81), 7 states have call predecessors, (81), 9 states have return successors, (79), 13 states have call predecessors, (79), 11 states have call successors, (79) [2022-12-14 15:41:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:08,910 INFO L93 Difference]: Finished difference Result 88034 states and 130972 transitions. [2022-12-14 15:41:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 15:41:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 11 states have call successors, (81), 7 states have call predecessors, (81), 9 states have return successors, (79), 13 states have call predecessors, (79), 11 states have call successors, (79) Word has length 234 [2022-12-14 15:41:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:09,212 INFO L225 Difference]: With dead ends: 88034 [2022-12-14 15:41:09,212 INFO L226 Difference]: Without dead ends: 56159 [2022-12-14 15:41:09,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 625 SyntacticMatches, 14 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11574 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=1726, Invalid=25006, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 15:41:09,338 INFO L413 NwaCegarLoop]: 997 mSDtfsCounter, 8133 mSDsluCounter, 5912 mSDsCounter, 0 mSdLazyCounter, 25148 mSolverCounterSat, 8740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8285 SdHoareTripleChecker+Valid, 6909 SdHoareTripleChecker+Invalid, 33888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8740 IncrementalHoareTripleChecker+Valid, 25148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:09,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8285 Valid, 6909 Invalid, 33888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8740 Valid, 25148 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-12-14 15:41:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56159 states. [2022-12-14 15:41:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56159 to 47913. [2022-12-14 15:41:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47913 states, 32391 states have (on average 1.3104874810904263) internal successors, (42448), 34987 states have internal predecessors, (42448), 11966 states have call successors, (11966), 3004 states have call predecessors, (11966), 3555 states have return successors, (15707), 10883 states have call predecessors, (15707), 11941 states have call successors, (15707) [2022-12-14 15:41:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47913 states to 47913 states and 70121 transitions. [2022-12-14 15:41:15,555 INFO L78 Accepts]: Start accepts. Automaton has 47913 states and 70121 transitions. Word has length 234 [2022-12-14 15:41:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:15,555 INFO L495 AbstractCegarLoop]: Abstraction has 47913 states and 70121 transitions. [2022-12-14 15:41:15,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 11 states have call successors, (81), 7 states have call predecessors, (81), 9 states have return successors, (79), 13 states have call predecessors, (79), 11 states have call successors, (79) [2022-12-14 15:41:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47913 states and 70121 transitions. [2022-12-14 15:41:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 15:41:15,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:15,579 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:15,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 15:41:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 15:41:15,780 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:41:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1352734696, now seen corresponding path program 1 times [2022-12-14 15:41:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:41:15,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966528871] [2022-12-14 15:41:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:41:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-12-14 15:41:16,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:41:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966528871] [2022-12-14 15:41:16,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966528871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:41:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991174195] [2022-12-14 15:41:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:16,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:16,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:16,072 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:16,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 15:41:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:41:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-12-14 15:41:16,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:41:16,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991174195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:41:16,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:41:16,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-12-14 15:41:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986628843] [2022-12-14 15:41:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:41:16,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:41:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:41:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:41:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-12-14 15:41:16,458 INFO L87 Difference]: Start difference. First operand 47913 states and 70121 transitions. Second operand has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:41:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:41:24,856 INFO L93 Difference]: Finished difference Result 86849 states and 129645 transitions. [2022-12-14 15:41:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:41:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 226 [2022-12-14 15:41:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:41:25,043 INFO L225 Difference]: With dead ends: 86849 [2022-12-14 15:41:25,043 INFO L226 Difference]: Without dead ends: 48680 [2022-12-14 15:41:25,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-12-14 15:41:25,173 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1182 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 3603 SdHoareTripleChecker+Invalid, 4118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:41:25,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 3603 Invalid, 4118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 15:41:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48680 states. [2022-12-14 15:41:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48680 to 47697. [2022-12-14 15:41:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47697 states, 32187 states have (on average 1.305775623699009) internal successors, (42029), 34783 states have internal predecessors, (42029), 11954 states have call successors, (11954), 3004 states have call predecessors, (11954), 3555 states have return successors, (15695), 10871 states have call predecessors, (15695), 11929 states have call successors, (15695) [2022-12-14 15:41:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47697 states to 47697 states and 69678 transitions. [2022-12-14 15:41:31,380 INFO L78 Accepts]: Start accepts. Automaton has 47697 states and 69678 transitions. Word has length 226 [2022-12-14 15:41:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:41:31,380 INFO L495 AbstractCegarLoop]: Abstraction has 47697 states and 69678 transitions. [2022-12-14 15:41:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:41:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 47697 states and 69678 transitions. [2022-12-14 15:41:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-12-14 15:41:31,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:41:31,404 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:41:31,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 15:41:31,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 15:41:31,605 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:41:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:41:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1750440969, now seen corresponding path program 1 times [2022-12-14 15:41:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:41:31,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804464129] [2022-12-14 15:41:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:41:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 15:41:31,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:41:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804464129] [2022-12-14 15:41:31,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804464129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:41:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854460407] [2022-12-14 15:41:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:41:31,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:41:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:41:31,801 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:41:31,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392a44d2-58b1-4a7c-aa9e-82725cacf6ed/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 15:41:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:41:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:41:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:41:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-12-14 15:41:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:41:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 15:41:33,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854460407] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:41:33,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87008214] [2022-12-14 15:41:33,177 INFO L159 IcfgInterpreter]: Started Sifa with 131 locations of interest [2022-12-14 15:41:33,177 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:41:33,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:41:33,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:41:33,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:41:40,081 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 572 for LOIs [2022-12-14 15:41:40,536 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-12-14 15:41:40,840 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 183 for LOIs [2022-12-14 15:41:42,289 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2022-12-14 15:41:42,293 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 66 for LOIs [2022-12-14 15:41:42,302 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 15:41:42,389 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 60 for LOIs [2022-12-14 15:41:42,564 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-12-14 15:41:42,566 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 15:41:45,933 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 43 for LOIs [2022-12-14 15:41:45,944 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 42 for LOIs [2022-12-14 15:41:45,954 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 35 for LOIs [2022-12-14 15:41:46,061 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-12-14 15:41:46,072 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 35 for LOIs [2022-12-14 15:41:46,080 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 525 for LOIs