./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:34:58,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:58,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:58,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:58,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:58,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:58,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:58,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:58,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:58,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:58,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:58,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:58,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:58,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:58,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:58,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:58,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:58,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:58,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:58,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:58,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:58,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:58,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:58,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:58,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:58,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:58,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:58,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:58,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:58,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:58,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:58,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:58,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:58,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:58,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:58,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:58,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:58,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:58,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:58,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:58,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:58,752 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:34:58,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:58,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:58,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:58,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:58,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:58,811 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:58,811 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:58,812 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:58,812 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:58,812 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:58,814 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:58,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:58,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:58,814 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:58,815 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:58,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:58,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:58,815 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:58,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:58,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:34:58,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:58,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:34:58,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:58,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:58,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:58,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:58,820 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:34:58,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:58,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:58,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:58,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:58,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:58,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:58,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:58,822 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:58,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:58,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:58,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:58,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:58,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:58,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:58,824 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_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2022-11-03 02:34:59,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:59,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:59,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:59,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:59,213 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:59,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-03 02:34:59,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/332da620c/11697d3feec2446191c8a2a56b2fa212/FLAG1f2eab980 [2022-11-03 02:35:00,017 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:00,018 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-03 02:35:00,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/332da620c/11697d3feec2446191c8a2a56b2fa212/FLAG1f2eab980 [2022-11-03 02:35:00,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/332da620c/11697d3feec2446191c8a2a56b2fa212 [2022-11-03 02:35:00,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:00,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:00,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:00,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:00,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:00,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:00" (1/1) ... [2022-11-03 02:35:00,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286baac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:00, skipping insertion in model container [2022-11-03 02:35:00,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:00" (1/1) ... [2022-11-03 02:35:00,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:00,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:00,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-03 02:35:00,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:00,948 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:00,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-03 02:35:01,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:01,130 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:01,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01 WrapperNode [2022-11-03 02:35:01,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:01,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:01,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:01,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:01,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,230 INFO L138 Inliner]: procedures = 90, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1061 [2022-11-03 02:35:01,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:01,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:01,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:01,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:01,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:01,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:01,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:01,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:01,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (1/1) ... [2022-11-03 02:35:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:01,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:01,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:35:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:35:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:35:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:35:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:35:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:35:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:35:01,402 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:35:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:35:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:35:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:35:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:35:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:35:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:35:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:35:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:35:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:35:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:35:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:35:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:35:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:35:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:35:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:35:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:35:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:35:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:35:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:35:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:35:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:35:01,406 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:35:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:35:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:35:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:35:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:35:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:35:01,407 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:35:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:35:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:35:01,408 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:35:01,408 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:35:01,408 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:35:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:35:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:35:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:01,409 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:35:01,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:35:01,616 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:01,618 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:02,913 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:03,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:03,699 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:03,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:03 BoogieIcfgContainer [2022-11-03 02:35:03,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:03,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:03,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:03,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:03,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:00" (1/3) ... [2022-11-03 02:35:03,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:03, skipping insertion in model container [2022-11-03 02:35:03,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:01" (2/3) ... [2022-11-03 02:35:03,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f2a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:03, skipping insertion in model container [2022-11-03 02:35:03,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:03" (3/3) ... [2022-11-03 02:35:03,713 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2022-11-03 02:35:03,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:03,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:03,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:03,809 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;@24de62c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:03,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-03 02:35:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:35:03,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:03,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:03,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash -484411217, now seen corresponding path program 1 times [2022-11-03 02:35:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:03,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826311696] [2022-11-03 02:35:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:35:04,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826311696] [2022-11-03 02:35:04,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826311696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:04,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:04,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125183461] [2022-11-03 02:35:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:04,815 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:35:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:05,724 INFO L93 Difference]: Finished difference Result 1019 states and 1636 transitions. [2022-11-03 02:35:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:35:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-03 02:35:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:05,744 INFO L225 Difference]: With dead ends: 1019 [2022-11-03 02:35:05,744 INFO L226 Difference]: Without dead ends: 673 [2022-11-03 02:35:05,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:05,755 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 523 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:05,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 2288 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:35:05,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-03 02:35:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2022-11-03 02:35:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 449 states have (on average 1.5679287305122493) internal successors, (704), 478 states have internal predecessors, (704), 176 states have call successors, (176), 43 states have call predecessors, (176), 41 states have return successors, (182), 170 states have call predecessors, (182), 174 states have call successors, (182) [2022-11-03 02:35:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1062 transitions. [2022-11-03 02:35:05,872 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1062 transitions. Word has length 73 [2022-11-03 02:35:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:05,872 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1062 transitions. [2022-11-03 02:35:05,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:35:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1062 transitions. [2022-11-03 02:35:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:35:05,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:05,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:05,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:05,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1001026953, now seen corresponding path program 1 times [2022-11-03 02:35:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:05,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728917126] [2022-11-03 02:35:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:05,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:35:06,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728917126] [2022-11-03 02:35:06,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728917126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:06,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:06,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598314964] [2022-11-03 02:35:06,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:06,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:06,467 INFO L87 Difference]: Start difference. First operand 667 states and 1062 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:35:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:07,252 INFO L93 Difference]: Finished difference Result 764 states and 1209 transitions. [2022-11-03 02:35:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:35:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-03 02:35:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:07,259 INFO L225 Difference]: With dead ends: 764 [2022-11-03 02:35:07,259 INFO L226 Difference]: Without dead ends: 762 [2022-11-03 02:35:07,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:07,262 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:07,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:35:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-03 02:35:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 752. [2022-11-03 02:35:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 500 states have (on average 1.534) internal successors, (767), 529 states have internal predecessors, (767), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1175 transitions. [2022-11-03 02:35:07,357 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1175 transitions. Word has length 77 [2022-11-03 02:35:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:07,360 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1175 transitions. [2022-11-03 02:35:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:35:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1175 transitions. [2022-11-03 02:35:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:35:07,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:07,371 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-03 02:35:07,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:35:07,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:07,374 INFO L85 PathProgramCache]: Analyzing trace with hash 756903943, now seen corresponding path program 1 times [2022-11-03 02:35:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634912752] [2022-11-03 02:35:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:35:07,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634912752] [2022-11-03 02:35:07,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634912752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:07,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:07,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454653742] [2022-11-03 02:35:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:07,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:07,645 INFO L87 Difference]: Start difference. First operand 752 states and 1175 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:35:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:07,840 INFO L93 Difference]: Finished difference Result 1530 states and 2419 transitions. [2022-11-03 02:35:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-03 02:35:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:07,848 INFO L225 Difference]: With dead ends: 1530 [2022-11-03 02:35:07,849 INFO L226 Difference]: Without dead ends: 790 [2022-11-03 02:35:07,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:07,861 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:07,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-03 02:35:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2022-11-03 02:35:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 504 states have (on average 1.5297619047619047) internal successors, (771), 533 states have internal predecessors, (771), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1179 transitions. [2022-11-03 02:35:07,970 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1179 transitions. Word has length 108 [2022-11-03 02:35:07,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:07,970 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1179 transitions. [2022-11-03 02:35:07,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:35:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1179 transitions. [2022-11-03 02:35:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:35:07,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:07,979 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-03 02:35:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:35:07,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2136138177, now seen corresponding path program 1 times [2022-11-03 02:35:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303455647] [2022-11-03 02:35:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:35:08,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303455647] [2022-11-03 02:35:08,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303455647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917171519] [2022-11-03 02:35:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:08,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:08,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:35:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:35:08,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:08,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917171519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:08,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:08,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 02:35:08,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787765512] [2022-11-03 02:35:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:08,771 INFO L87 Difference]: Start difference. First operand 756 states and 1179 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:09,105 INFO L93 Difference]: Finished difference Result 1578 states and 2508 transitions. [2022-11-03 02:35:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:09,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-03 02:35:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:09,113 INFO L225 Difference]: With dead ends: 1578 [2022-11-03 02:35:09,114 INFO L226 Difference]: Without dead ends: 834 [2022-11-03 02:35:09,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:09,132 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:09,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-03 02:35:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2022-11-03 02:35:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 580 states have (on average 1.5810344827586207) internal successors, (917), 609 states have internal predecessors, (917), 198 states have call successors, (198), 58 states have call predecessors, (198), 55 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1325 transitions. [2022-11-03 02:35:09,194 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1325 transitions. Word has length 111 [2022-11-03 02:35:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:09,195 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1325 transitions. [2022-11-03 02:35:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1325 transitions. [2022-11-03 02:35:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:35:09,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:09,201 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-03 02:35:09,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:09,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:09,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:09,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2099866642, now seen corresponding path program 1 times [2022-11-03 02:35:09,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280485264] [2022-11-03 02:35:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:09,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:35:09,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280485264] [2022-11-03 02:35:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280485264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167137745] [2022-11-03 02:35:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:09,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:09,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:35:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:35:09,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:09,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167137745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:09,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:09,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:35:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492859840] [2022-11-03 02:35:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:09,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:09,988 INFO L87 Difference]: Start difference. First operand 834 states and 1325 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:10,370 INFO L93 Difference]: Finished difference Result 1734 states and 2798 transitions. [2022-11-03 02:35:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-03 02:35:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:10,378 INFO L225 Difference]: With dead ends: 1734 [2022-11-03 02:35:10,378 INFO L226 Difference]: Without dead ends: 912 [2022-11-03 02:35:10,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:10,385 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:10,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-03 02:35:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-11-03 02:35:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 656 states have (on average 1.6204268292682926) internal successors, (1063), 685 states have internal predecessors, (1063), 198 states have call successors, (198), 60 states have call predecessors, (198), 57 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1471 transitions. [2022-11-03 02:35:10,444 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1471 transitions. Word has length 116 [2022-11-03 02:35:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:10,444 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1471 transitions. [2022-11-03 02:35:10,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1471 transitions. [2022-11-03 02:35:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:35:10,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:10,449 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-03 02:35:10,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:10,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:10,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -438632994, now seen corresponding path program 1 times [2022-11-03 02:35:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:10,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206201829] [2022-11-03 02:35:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 02:35:10,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206201829] [2022-11-03 02:35:10,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206201829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92249433] [2022-11-03 02:35:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:10,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:10,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:35:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:35:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:35:11,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:11,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92249433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:11,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:11,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:35:11,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058440124] [2022-11-03 02:35:11,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:11,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:11,408 INFO L87 Difference]: Start difference. First operand 912 states and 1471 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:11,795 INFO L93 Difference]: Finished difference Result 1890 states and 3088 transitions. [2022-11-03 02:35:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-03 02:35:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:11,804 INFO L225 Difference]: With dead ends: 1890 [2022-11-03 02:35:11,804 INFO L226 Difference]: Without dead ends: 990 [2022-11-03 02:35:11,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:11,812 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:11,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-03 02:35:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-03 02:35:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 732 states have (on average 1.651639344262295) internal successors, (1209), 761 states have internal predecessors, (1209), 198 states have call successors, (198), 62 states have call predecessors, (198), 59 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1617 transitions. [2022-11-03 02:35:11,891 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1617 transitions. Word has length 120 [2022-11-03 02:35:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:11,892 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1617 transitions. [2022-11-03 02:35:11,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1617 transitions. [2022-11-03 02:35:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:35:11,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:11,899 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-11-03 02:35:11,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:12,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:35:12,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:12,125 INFO L85 PathProgramCache]: Analyzing trace with hash 549834207, now seen corresponding path program 1 times [2022-11-03 02:35:12,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606907678] [2022-11-03 02:35:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:35:12,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606907678] [2022-11-03 02:35:12,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606907678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106152194] [2022-11-03 02:35:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:12,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:12,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:12,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:12,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:35:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:12,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:35:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:35:12,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:12,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106152194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:12,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:35:12,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:35:12,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706415871] [2022-11-03 02:35:12,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:12,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:12,723 INFO L87 Difference]: Start difference. First operand 990 states and 1617 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:13,132 INFO L93 Difference]: Finished difference Result 2046 states and 3378 transitions. [2022-11-03 02:35:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:13,133 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-03 02:35:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:13,151 INFO L225 Difference]: With dead ends: 2046 [2022-11-03 02:35:13,151 INFO L226 Difference]: Without dead ends: 1068 [2022-11-03 02:35:13,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:13,162 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:13,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-11-03 02:35:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2022-11-03 02:35:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 808 states have (on average 1.676980198019802) internal successors, (1355), 837 states have internal predecessors, (1355), 198 states have call successors, (198), 64 states have call predecessors, (198), 61 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1763 transitions. [2022-11-03 02:35:13,228 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1763 transitions. Word has length 123 [2022-11-03 02:35:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:13,230 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1763 transitions. [2022-11-03 02:35:13,230 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:35:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1763 transitions. [2022-11-03 02:35:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:35:13,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:13,236 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] [2022-11-03 02:35:13,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:13,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:13,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2146047567, now seen corresponding path program 1 times [2022-11-03 02:35:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:13,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7340902] [2022-11-03 02:35:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:13,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:35:13,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7340902] [2022-11-03 02:35:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7340902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:13,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:13,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282298306] [2022-11-03 02:35:13,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:13,662 INFO L87 Difference]: Start difference. First operand 1068 states and 1763 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:35:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:14,055 INFO L93 Difference]: Finished difference Result 2208 states and 3666 transitions. [2022-11-03 02:35:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2022-11-03 02:35:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:14,064 INFO L225 Difference]: With dead ends: 2208 [2022-11-03 02:35:14,065 INFO L226 Difference]: Without dead ends: 1136 [2022-11-03 02:35:14,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:14,073 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-03 02:35:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-11-03 02:35:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 874 states have (on average 1.591533180778032) internal successors, (1391), 903 states have internal predecessors, (1391), 198 states have call successors, (198), 66 states have call predecessors, (198), 63 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-03 02:35:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1799 transitions. [2022-11-03 02:35:14,142 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1799 transitions. Word has length 125 [2022-11-03 02:35:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:14,142 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1799 transitions. [2022-11-03 02:35:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:35:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1799 transitions. [2022-11-03 02:35:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:35:14,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:14,148 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 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] [2022-11-03 02:35:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:14,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash 623391102, now seen corresponding path program 1 times [2022-11-03 02:35:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:14,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124783914] [2022-11-03 02:35:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:14,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:35:14,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124783914] [2022-11-03 02:35:14,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124783914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:14,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:14,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:35:14,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086858125] [2022-11-03 02:35:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:14,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:35:14,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:35:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:14,524 INFO L87 Difference]: Start difference. First operand 1136 states and 1799 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:35:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:15,368 INFO L93 Difference]: Finished difference Result 2331 states and 3678 transitions. [2022-11-03 02:35:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:35:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 125 [2022-11-03 02:35:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:15,376 INFO L225 Difference]: With dead ends: 2331 [2022-11-03 02:35:15,376 INFO L226 Difference]: Without dead ends: 1024 [2022-11-03 02:35:15,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:35:15,385 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 659 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:15,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 2574 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:35:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-11-03 02:35:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1002. [2022-11-03 02:35:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 724 states have (on average 1.5) internal successors, (1086), 755 states have internal predecessors, (1086), 207 states have call successors, (207), 74 states have call predecessors, (207), 70 states have return successors, (224), 196 states have call predecessors, (224), 204 states have call successors, (224) [2022-11-03 02:35:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1517 transitions. [2022-11-03 02:35:15,443 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1517 transitions. Word has length 125 [2022-11-03 02:35:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:15,443 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1517 transitions. [2022-11-03 02:35:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:35:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1517 transitions. [2022-11-03 02:35:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:35:15,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:15,449 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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] [2022-11-03 02:35:15,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:15,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1665311154, now seen corresponding path program 1 times [2022-11-03 02:35:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958129368] [2022-11-03 02:35:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:35:17,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958129368] [2022-11-03 02:35:17,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958129368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238489123] [2022-11-03 02:35:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:17,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:17,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:17,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:35:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:17,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:35:17,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:35:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:11,814 WARN L234 SmtUtils]: Spent 49.20s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 02:36:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-03 02:36:15,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238489123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7284952] [2022-11-03 02:36:15,050 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-03 02:36:15,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:15,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:15,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:15,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:18,238 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-03 02:36:22,026 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-03 02:36:22,680 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2022-11-03 02:36:29,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:29,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:29,621 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:36:29,625 INFO L158 Benchmark]: Toolchain (without parser) took 89431.24ms. Allocated memory was 113.2MB in the beginning and 625.0MB in the end (delta: 511.7MB). Free memory was 75.3MB in the beginning and 239.6MB in the end (delta: -164.3MB). Peak memory consumption was 387.4MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,626 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory was 83.7MB in the beginning and 83.7MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:29,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 934.68ms. Allocated memory is still 113.2MB. Free memory was 75.1MB in the beginning and 60.6MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.25ms. Allocated memory is still 113.2MB. Free memory was 60.6MB in the beginning and 55.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,627 INFO L158 Benchmark]: Boogie Preprocessor took 66.24ms. Allocated memory is still 113.2MB. Free memory was 55.4MB in the beginning and 50.0MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,627 INFO L158 Benchmark]: RCFGBuilder took 2405.61ms. Allocated memory was 113.2MB in the beginning and 184.5MB in the end (delta: 71.3MB). Free memory was 50.0MB in the beginning and 91.7MB in the end (delta: -41.7MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,628 INFO L158 Benchmark]: TraceAbstraction took 85919.02ms. Allocated memory was 184.5MB in the beginning and 625.0MB in the end (delta: 440.4MB). Free memory was 91.7MB in the beginning and 239.6MB in the end (delta: -147.9MB). Peak memory consumption was 332.6MB. Max. memory is 16.1GB. [2022-11-03 02:36:29,629 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory was 83.7MB in the beginning and 83.7MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 934.68ms. Allocated memory is still 113.2MB. Free memory was 75.1MB in the beginning and 60.6MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.25ms. Allocated memory is still 113.2MB. Free memory was 60.6MB in the beginning and 55.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.24ms. Allocated memory is still 113.2MB. Free memory was 55.4MB in the beginning and 50.0MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2405.61ms. Allocated memory was 113.2MB in the beginning and 184.5MB in the end (delta: 71.3MB). Free memory was 50.0MB in the beginning and 91.7MB in the end (delta: -41.7MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. * TraceAbstraction took 85919.02ms. Allocated memory was 184.5MB in the beginning and 625.0MB in the end (delta: 440.4MB). Free memory was 91.7MB in the beginning and 239.6MB in the end (delta: -147.9MB). Peak memory consumption was 332.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:36:29,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:36:32,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:36:32,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:36:32,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:36:32,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:36:32,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:36:32,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:36:32,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:36:32,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:36:32,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:36:32,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:36:32,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:36:32,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:36:32,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:36:32,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:36:32,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:36:32,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:36:32,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:36:32,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:36:32,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:36:32,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:36:32,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:36:32,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:36:32,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:36:32,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:36:32,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:36:32,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:36:32,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:36:32,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:36:32,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:36:32,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:36:32,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:36:32,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:36:32,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:36:32,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:36:32,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:36:32,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:36:32,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:36:32,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:36:32,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:36:32,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:36:32,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:36:32,212 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:36:32,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:36:32,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:36:32,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:36:32,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:36:32,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:36:32,216 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:36:32,216 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:36:32,216 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:36:32,217 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:36:32,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:36:32,218 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:36:32,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:36:32,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:36:32,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:36:32,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:36:32,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:36:32,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:36:32,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:36:32,221 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:36:32,222 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:36:32,222 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:36:32,222 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:36:32,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:36:32,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:36:32,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:36:32,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:36:32,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:36:32,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:36:32,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:32,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:36:32,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:36:32,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:36:32,225 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:36:32,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:32,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:36:32,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:36:32,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:36:32,226 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2022-11-03 02:36:32,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:36:32,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:36:32,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:36:32,687 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:36:32,688 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:36:32,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-03 02:36:32,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/8c0331d7c/429ae9b6bd2e44c69b97510e857145f8/FLAGe140f45dd [2022-11-03 02:36:33,561 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:36:33,561 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-03 02:36:33,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/8c0331d7c/429ae9b6bd2e44c69b97510e857145f8/FLAGe140f45dd [2022-11-03 02:36:33,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/data/8c0331d7c/429ae9b6bd2e44c69b97510e857145f8 [2022-11-03 02:36:33,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:36:33,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:36:33,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:33,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:36:33,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:36:33,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:33" (1/1) ... [2022-11-03 02:36:33,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6e97b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:33, skipping insertion in model container [2022-11-03 02:36:33,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:33" (1/1) ... [2022-11-03 02:36:33,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:36:33,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:34,038 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-03 02:36:34,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:34,372 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:36:34,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:34,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-03 02:36:34,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:34,540 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:36:34,570 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-03 02:36:34,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:34,738 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:36:34,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34 WrapperNode [2022-11-03 02:36:34,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:34,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:34,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:36:34,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:36:34,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,879 INFO L138 Inliner]: procedures = 92, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1004 [2022-11-03 02:36:34,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:34,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:36:34,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:36:34,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:36:34,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:36:34,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:36:34,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:36:34,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:36:34,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (1/1) ... [2022-11-03 02:36:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:35,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:35,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:36:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:36:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:36:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:36:35,084 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:36:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:36:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:36:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:36:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:36:35,085 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:36:35,085 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:36:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:36:35,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:36:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:36:35,086 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:36:35,086 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:36:35,087 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:36:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:36:35,087 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:36:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:36:35,087 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:36:35,087 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:36:35,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:36:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:36:35,088 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:36:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:36:35,088 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:36:35,089 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:36:35,089 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:36:35,090 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:36:35,090 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:36:35,090 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 02:36:35,090 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:36:35,090 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:36:35,091 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:36:35,091 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:36:35,091 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:36:35,091 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:36:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:36:35,092 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:36:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:36:35,092 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:36:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:36:35,092 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:36:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:36:35,093 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:36:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:36:35,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:36:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:36:35,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:36:35,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:36:35,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:36:36,733 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:36:36,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:36:36,752 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:36:36,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:36 BoogieIcfgContainer [2022-11-03 02:36:36,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:36:36,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:36:36,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:36:36,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:36:36,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:36:33" (1/3) ... [2022-11-03 02:36:36,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd06cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:36, skipping insertion in model container [2022-11-03 02:36:36,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:34" (2/3) ... [2022-11-03 02:36:36,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd06cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:36, skipping insertion in model container [2022-11-03 02:36:36,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:36" (3/3) ... [2022-11-03 02:36:36,770 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2022-11-03 02:36:36,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:36:36,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:36:36,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:36:36,867 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;@71312f32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:36:36,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:36:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-03 02:36:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 02:36:36,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:36,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:36,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:36,939 INFO L85 PathProgramCache]: Analyzing trace with hash -63846354, now seen corresponding path program 1 times [2022-11-03 02:36:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574419345] [2022-11-03 02:36:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:36,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:36,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:36:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:37,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:37,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574419345] [2022-11-03 02:36:37,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574419345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:37,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:37,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320444795] [2022-11-03 02:36:37,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:37,597 INFO L87 Difference]: Start difference. First operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:37,924 INFO L93 Difference]: Finished difference Result 1045 states and 1748 transitions. [2022-11-03 02:36:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-03 02:36:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:37,972 INFO L225 Difference]: With dead ends: 1045 [2022-11-03 02:36:37,972 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 02:36:37,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:37,986 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 15 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:37,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2561 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 02:36:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 02:36:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.6732186732186731) internal successors, (681), 422 states have internal predecessors, (681), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 862 transitions. [2022-11-03 02:36:38,133 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 862 transitions. Word has length 101 [2022-11-03 02:36:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:38,141 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 862 transitions. [2022-11-03 02:36:38,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 862 transitions. [2022-11-03 02:36:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:36:38,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:38,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:38,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:38,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:38,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -90127163, now seen corresponding path program 1 times [2022-11-03 02:36:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969755927] [2022-11-03 02:36:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:38,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:38,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:38,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:36:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:38,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:38,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:38,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969755927] [2022-11-03 02:36:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969755927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:38,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:38,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421181068] [2022-11-03 02:36:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:38,854 INFO L87 Difference]: Start difference. First operand 521 states and 862 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:39,001 INFO L93 Difference]: Finished difference Result 1025 states and 1701 transitions. [2022-11-03 02:36:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2022-11-03 02:36:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:39,011 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 02:36:39,011 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 02:36:39,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:39,017 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 12 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:39,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2529 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 02:36:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 02:36:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.6707616707616708) internal successors, (680), 422 states have internal predecessors, (680), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 861 transitions. [2022-11-03 02:36:39,084 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 861 transitions. Word has length 102 [2022-11-03 02:36:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:39,084 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 861 transitions. [2022-11-03 02:36:39,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 861 transitions. [2022-11-03 02:36:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:36:39,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:39,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:39,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:39,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1445673078, now seen corresponding path program 1 times [2022-11-03 02:36:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:39,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431656679] [2022-11-03 02:36:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:39,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:39,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:39,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:39,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:36:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:39,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:39,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:39,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:39,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431656679] [2022-11-03 02:36:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431656679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:39,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:39,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:39,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065270297] [2022-11-03 02:36:39,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:39,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:39,787 INFO L87 Difference]: Start difference. First operand 521 states and 861 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:39,894 INFO L93 Difference]: Finished difference Result 1025 states and 1700 transitions. [2022-11-03 02:36:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2022-11-03 02:36:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:39,900 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 02:36:39,901 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 02:36:39,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:39,907 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 10 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:39,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2529 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 02:36:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 02:36:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.6683046683046683) internal successors, (679), 422 states have internal predecessors, (679), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 860 transitions. [2022-11-03 02:36:39,953 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 860 transitions. Word has length 103 [2022-11-03 02:36:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:39,956 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 860 transitions. [2022-11-03 02:36:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 860 transitions. [2022-11-03 02:36:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 02:36:39,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:39,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:40,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1058764319, now seen corresponding path program 1 times [2022-11-03 02:36:40,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:40,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135231957] [2022-11-03 02:36:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:40,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:40,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:40,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:36:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:40,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:40,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135231957] [2022-11-03 02:36:40,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135231957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:40,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:40,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:40,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379588233] [2022-11-03 02:36:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:40,590 INFO L87 Difference]: Start difference. First operand 521 states and 860 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:40,673 INFO L93 Difference]: Finished difference Result 1025 states and 1699 transitions. [2022-11-03 02:36:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2022-11-03 02:36:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:40,679 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 02:36:40,680 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 02:36:40,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:40,689 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 8 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:40,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2529 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 02:36:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 02:36:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.6658476658476657) internal successors, (678), 422 states have internal predecessors, (678), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 859 transitions. [2022-11-03 02:36:40,731 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 859 transitions. Word has length 104 [2022-11-03 02:36:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:40,732 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 859 transitions. [2022-11-03 02:36:40,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 859 transitions. [2022-11-03 02:36:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 02:36:40,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:40,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:40,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:40,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:40,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1804631782, now seen corresponding path program 1 times [2022-11-03 02:36:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081691731] [2022-11-03 02:36:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:40,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:40,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:36:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:41,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:41,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:41,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081691731] [2022-11-03 02:36:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081691731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:41,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:41,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134837433] [2022-11-03 02:36:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:41,360 INFO L87 Difference]: Start difference. First operand 521 states and 859 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:41,430 INFO L93 Difference]: Finished difference Result 1025 states and 1698 transitions. [2022-11-03 02:36:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2022-11-03 02:36:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:41,434 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 02:36:41,435 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 02:36:41,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:41,439 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 6 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:41,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2529 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 02:36:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 02:36:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.6633906633906634) internal successors, (677), 422 states have internal predecessors, (677), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 858 transitions. [2022-11-03 02:36:41,465 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 858 transitions. Word has length 105 [2022-11-03 02:36:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 858 transitions. [2022-11-03 02:36:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 858 transitions. [2022-11-03 02:36:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:36:41,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:41,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:41,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:41,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:41,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:41,685 INFO L85 PathProgramCache]: Analyzing trace with hash -165243139, now seen corresponding path program 1 times [2022-11-03 02:36:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125522535] [2022-11-03 02:36:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:41,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:41,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:41,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:41,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:36:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:42,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:42,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:42,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:42,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125522535] [2022-11-03 02:36:42,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125522535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:42,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:42,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:36:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670723844] [2022-11-03 02:36:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:42,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:36:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:36:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:42,105 INFO L87 Difference]: Start difference. First operand 521 states and 858 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:42,329 INFO L93 Difference]: Finished difference Result 1036 states and 1715 transitions. [2022-11-03 02:36:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2022-11-03 02:36:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:42,334 INFO L225 Difference]: With dead ends: 1036 [2022-11-03 02:36:42,335 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 02:36:42,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:42,339 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 117 mSDsluCounter, 4120 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4964 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:42,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 4964 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 02:36:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2022-11-03 02:36:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 417 states have (on average 1.65947242206235) internal successors, (692), 434 states have internal predecessors, (692), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (94), 89 states have call predecessors, (94), 91 states have call successors, (94) [2022-11-03 02:36:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 878 transitions. [2022-11-03 02:36:42,369 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 878 transitions. Word has length 106 [2022-11-03 02:36:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:42,369 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 878 transitions. [2022-11-03 02:36:42,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 878 transitions. [2022-11-03 02:36:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:36:42,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:42,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:42,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:42,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:42,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 773288476, now seen corresponding path program 1 times [2022-11-03 02:36:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412626099] [2022-11-03 02:36:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:42,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:42,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:42,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:36:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:42,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:42,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:42,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412626099] [2022-11-03 02:36:42,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412626099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:42,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:42,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036166437] [2022-11-03 02:36:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:42,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:42,961 INFO L87 Difference]: Start difference. First operand 534 states and 878 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:43,043 INFO L93 Difference]: Finished difference Result 1043 states and 1726 transitions. [2022-11-03 02:36:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2022-11-03 02:36:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:43,049 INFO L225 Difference]: With dead ends: 1043 [2022-11-03 02:36:43,049 INFO L226 Difference]: Without dead ends: 530 [2022-11-03 02:36:43,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:43,054 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 6 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2528 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:43,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2528 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-11-03 02:36:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2022-11-03 02:36:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 415 states have (on average 1.6602409638554216) internal successors, (689), 431 states have internal predecessors, (689), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2022-11-03 02:36:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 871 transitions. [2022-11-03 02:36:43,084 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 871 transitions. Word has length 106 [2022-11-03 02:36:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 871 transitions. [2022-11-03 02:36:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 871 transitions. [2022-11-03 02:36:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:36:43,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:43,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:43,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:43,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1036237632, now seen corresponding path program 1 times [2022-11-03 02:36:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137399421] [2022-11-03 02:36:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:43,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:43,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:43,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:43,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:36:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:43,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:43,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:43,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:43,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137399421] [2022-11-03 02:36:43,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137399421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:43,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:43,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:43,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651456719] [2022-11-03 02:36:43,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:43,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:43,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:43,678 INFO L87 Difference]: Start difference. First operand 530 states and 871 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:43,888 INFO L93 Difference]: Finished difference Result 1068 states and 1770 transitions. [2022-11-03 02:36:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2022-11-03 02:36:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:43,894 INFO L225 Difference]: With dead ends: 1068 [2022-11-03 02:36:43,894 INFO L226 Difference]: Without dead ends: 544 [2022-11-03 02:36:43,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:43,898 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 114 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:43,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2357 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-03 02:36:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 535. [2022-11-03 02:36:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.6476190476190475) internal successors, (692), 435 states have internal predecessors, (692), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 873 transitions. [2022-11-03 02:36:43,926 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 873 transitions. Word has length 107 [2022-11-03 02:36:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:43,926 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 873 transitions. [2022-11-03 02:36:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 873 transitions. [2022-11-03 02:36:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:36:43,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:43,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:43,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:44,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:44,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1043344128, now seen corresponding path program 1 times [2022-11-03 02:36:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348434611] [2022-11-03 02:36:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:44,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:36:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:44,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:44,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:44,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348434611] [2022-11-03 02:36:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348434611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:44,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:44,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507700286] [2022-11-03 02:36:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:44,577 INFO L87 Difference]: Start difference. First operand 535 states and 873 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:44,779 INFO L93 Difference]: Finished difference Result 1019 states and 1666 transitions. [2022-11-03 02:36:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-11-03 02:36:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:44,786 INFO L225 Difference]: With dead ends: 1019 [2022-11-03 02:36:44,786 INFO L226 Difference]: Without dead ends: 535 [2022-11-03 02:36:44,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:44,792 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 78 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:44,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2360 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-03 02:36:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2022-11-03 02:36:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.638095238095238) internal successors, (688), 435 states have internal predecessors, (688), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 869 transitions. [2022-11-03 02:36:44,819 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 869 transitions. Word has length 108 [2022-11-03 02:36:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:44,819 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 869 transitions. [2022-11-03 02:36:44,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 869 transitions. [2022-11-03 02:36:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:36:44,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:44,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:44,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:45,040 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 78787589, now seen corresponding path program 1 times [2022-11-03 02:36:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876955200] [2022-11-03 02:36:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:45,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:45,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:36:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:45,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:45,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876955200] [2022-11-03 02:36:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876955200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:45,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:45,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574028969] [2022-11-03 02:36:45,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:45,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:45,457 INFO L87 Difference]: Start difference. First operand 535 states and 869 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:45,622 INFO L93 Difference]: Finished difference Result 1019 states and 1662 transitions. [2022-11-03 02:36:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2022-11-03 02:36:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:45,631 INFO L225 Difference]: With dead ends: 1019 [2022-11-03 02:36:45,631 INFO L226 Difference]: Without dead ends: 535 [2022-11-03 02:36:45,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:45,635 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 73 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:45,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 2360 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-03 02:36:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2022-11-03 02:36:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.6285714285714286) internal successors, (684), 435 states have internal predecessors, (684), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 865 transitions. [2022-11-03 02:36:45,662 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 865 transitions. Word has length 109 [2022-11-03 02:36:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:45,662 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 865 transitions. [2022-11-03 02:36:45,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 865 transitions. [2022-11-03 02:36:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:36:45,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:45,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:45,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:45,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:45,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1866993797, now seen corresponding path program 1 times [2022-11-03 02:36:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:45,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617871618] [2022-11-03 02:36:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:45,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:45,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:36:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:46,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:46,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617871618] [2022-11-03 02:36:46,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617871618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:46,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:46,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:36:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669629574] [2022-11-03 02:36:46,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:46,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:36:46,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:36:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:46,288 INFO L87 Difference]: Start difference. First operand 535 states and 865 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:46,448 INFO L93 Difference]: Finished difference Result 1028 states and 1672 transitions. [2022-11-03 02:36:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-03 02:36:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:46,455 INFO L225 Difference]: With dead ends: 1028 [2022-11-03 02:36:46,455 INFO L226 Difference]: Without dead ends: 523 [2022-11-03 02:36:46,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:46,459 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 107 mSDsluCounter, 4046 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:46,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 4880 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-03 02:36:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 514. [2022-11-03 02:36:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6215538847117794) internal successors, (647), 414 states have internal predecessors, (647), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 828 transitions. [2022-11-03 02:36:46,480 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 828 transitions. Word has length 109 [2022-11-03 02:36:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:46,481 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 828 transitions. [2022-11-03 02:36:46,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 828 transitions. [2022-11-03 02:36:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:36:46,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:46,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:46,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:46,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1669789285, now seen corresponding path program 1 times [2022-11-03 02:36:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:46,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290804918] [2022-11-03 02:36:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:46,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:46,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:46,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:36:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:47,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:47,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290804918] [2022-11-03 02:36:47,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290804918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:47,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:47,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:47,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521341428] [2022-11-03 02:36:47,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:47,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:47,104 INFO L87 Difference]: Start difference. First operand 514 states and 828 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:47,203 INFO L93 Difference]: Finished difference Result 998 states and 1621 transitions. [2022-11-03 02:36:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2022-11-03 02:36:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:47,209 INFO L225 Difference]: With dead ends: 998 [2022-11-03 02:36:47,210 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:36:47,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:47,214 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 41 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:47,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2360 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:36:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-11-03 02:36:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.619047619047619) internal successors, (646), 414 states have internal predecessors, (646), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 827 transitions. [2022-11-03 02:36:47,237 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 827 transitions. Word has length 110 [2022-11-03 02:36:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:47,237 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 827 transitions. [2022-11-03 02:36:47,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 827 transitions. [2022-11-03 02:36:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:36:47,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:47,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:47,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:47,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:47,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash 615891146, now seen corresponding path program 1 times [2022-11-03 02:36:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:47,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459753262] [2022-11-03 02:36:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:47,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:47,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:47,467 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:47,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:36:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:47,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:47,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459753262] [2022-11-03 02:36:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459753262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:47,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:47,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:47,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894996647] [2022-11-03 02:36:47,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:47,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:47,858 INFO L87 Difference]: Start difference. First operand 514 states and 827 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:47,983 INFO L93 Difference]: Finished difference Result 998 states and 1620 transitions. [2022-11-03 02:36:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2022-11-03 02:36:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:47,989 INFO L225 Difference]: With dead ends: 998 [2022-11-03 02:36:47,990 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:36:47,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:47,995 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 39 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:47,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2360 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:36:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-11-03 02:36:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6165413533834587) internal successors, (645), 414 states have internal predecessors, (645), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 826 transitions. [2022-11-03 02:36:48,024 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 826 transitions. Word has length 111 [2022-11-03 02:36:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:48,025 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 826 transitions. [2022-11-03 02:36:48,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 826 transitions. [2022-11-03 02:36:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:36:48,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:48,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:48,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:48,253 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:48,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 499332940, now seen corresponding path program 1 times [2022-11-03 02:36:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084335175] [2022-11-03 02:36:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:48,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:48,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:48,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:48,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:36:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:48,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:48,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:48,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:48,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084335175] [2022-11-03 02:36:48,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084335175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:48,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:48,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:48,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740728009] [2022-11-03 02:36:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:48,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:48,654 INFO L87 Difference]: Start difference. First operand 514 states and 826 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:48,755 INFO L93 Difference]: Finished difference Result 998 states and 1619 transitions. [2022-11-03 02:36:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2022-11-03 02:36:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:48,760 INFO L225 Difference]: With dead ends: 998 [2022-11-03 02:36:48,760 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 02:36:48,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:48,764 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 65 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:48,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2341 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 02:36:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-11-03 02:36:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6140350877192982) internal successors, (644), 414 states have internal predecessors, (644), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 825 transitions. [2022-11-03 02:36:48,787 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 825 transitions. Word has length 112 [2022-11-03 02:36:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:48,789 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 825 transitions. [2022-11-03 02:36:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:36:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 825 transitions. [2022-11-03 02:36:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:36:48,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:48,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:48,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:49,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash -825523254, now seen corresponding path program 1 times [2022-11-03 02:36:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:49,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856745689] [2022-11-03 02:36:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:49,011 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:49,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:36:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:36:49,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:49,447 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856745689] [2022-11-03 02:36:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856745689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:49,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:49,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:36:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931017218] [2022-11-03 02:36:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:36:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:36:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:49,450 INFO L87 Difference]: Start difference. First operand 514 states and 825 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:49,727 INFO L93 Difference]: Finished difference Result 997 states and 1615 transitions. [2022-11-03 02:36:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-03 02:36:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:49,732 INFO L225 Difference]: With dead ends: 997 [2022-11-03 02:36:49,732 INFO L226 Difference]: Without dead ends: 519 [2022-11-03 02:36:49,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:36:49,738 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 45 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 5439 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:49,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 5439 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:36:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-03 02:36:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 516. [2022-11-03 02:36:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 401 states have (on average 1.6084788029925188) internal successors, (645), 416 states have internal predecessors, (645), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:36:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 826 transitions. [2022-11-03 02:36:49,762 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 826 transitions. Word has length 112 [2022-11-03 02:36:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:49,763 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 826 transitions. [2022-11-03 02:36:49,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:36:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 826 transitions. [2022-11-03 02:36:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:36:49,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:49,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:49,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:49,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:49,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1609037407, now seen corresponding path program 1 times [2022-11-03 02:36:49,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:49,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527209695] [2022-11-03 02:36:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:49,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:49,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:50,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:36:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:36:50,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:50,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527209695] [2022-11-03 02:36:50,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527209695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:50,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:50,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:50,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357334936] [2022-11-03 02:36:50,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:50,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:50,422 INFO L87 Difference]: Start difference. First operand 516 states and 826 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:51,319 INFO L93 Difference]: Finished difference Result 993 states and 1633 transitions. [2022-11-03 02:36:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:36:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-11-03 02:36:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:51,325 INFO L225 Difference]: With dead ends: 993 [2022-11-03 02:36:51,325 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 02:36:51,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:51,329 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 755 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:51,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 1989 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:36:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 02:36:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-11-03 02:36:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 404 states have (on average 1.603960396039604) internal successors, (648), 419 states have internal predecessors, (648), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2022-11-03 02:36:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 830 transitions. [2022-11-03 02:36:51,363 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 830 transitions. Word has length 113 [2022-11-03 02:36:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:51,364 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 830 transitions. [2022-11-03 02:36:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 830 transitions. [2022-11-03 02:36:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:36:51,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:51,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:51,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -306671440, now seen corresponding path program 1 times [2022-11-03 02:36:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598708694] [2022-11-03 02:36:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:51,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:51,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:36:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:36:52,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:52,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598708694] [2022-11-03 02:36:52,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598708694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:52,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:52,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453633394] [2022-11-03 02:36:52,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:52,069 INFO L87 Difference]: Start difference. First operand 520 states and 830 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:53,027 INFO L93 Difference]: Finished difference Result 1002 states and 1640 transitions. [2022-11-03 02:36:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:36:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2022-11-03 02:36:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:53,031 INFO L225 Difference]: With dead ends: 1002 [2022-11-03 02:36:53,032 INFO L226 Difference]: Without dead ends: 525 [2022-11-03 02:36:53,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:53,036 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 743 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:53,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1990 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:36:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-03 02:36:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-11-03 02:36:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.5980392156862746) internal successors, (652), 423 states have internal predecessors, (652), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2022-11-03 02:36:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 835 transitions. [2022-11-03 02:36:53,067 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 835 transitions. Word has length 116 [2022-11-03 02:36:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:53,068 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 835 transitions. [2022-11-03 02:36:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 835 transitions. [2022-11-03 02:36:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 02:36:53,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:53,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:53,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:53,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:53,290 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash -869901509, now seen corresponding path program 1 times [2022-11-03 02:36:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:53,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628812599] [2022-11-03 02:36:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:53,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:53,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:53,293 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:53,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:36:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:53,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:36:53,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:53,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:53,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628812599] [2022-11-03 02:36:53,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628812599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:53,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:53,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174673080] [2022-11-03 02:36:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:53,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:53,763 INFO L87 Difference]: Start difference. First operand 525 states and 835 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:54,629 INFO L93 Difference]: Finished difference Result 1013 states and 1649 transitions. [2022-11-03 02:36:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:36:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2022-11-03 02:36:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:54,636 INFO L225 Difference]: With dead ends: 1013 [2022-11-03 02:36:54,636 INFO L226 Difference]: Without dead ends: 531 [2022-11-03 02:36:54,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:54,640 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 753 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:54,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 1990 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:36:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-03 02:36:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-11-03 02:36:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.5907990314769975) internal successors, (657), 428 states have internal predecessors, (657), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2022-11-03 02:36:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 841 transitions. [2022-11-03 02:36:54,665 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 841 transitions. Word has length 119 [2022-11-03 02:36:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:54,666 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 841 transitions. [2022-11-03 02:36:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 841 transitions. [2022-11-03 02:36:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:36:54,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:54,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:54,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:54,900 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1862775100, now seen corresponding path program 1 times [2022-11-03 02:36:54,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:54,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422193183] [2022-11-03 02:36:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:54,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:54,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:54,903 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:54,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:36:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:36:55,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:55,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422193183] [2022-11-03 02:36:55,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422193183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:55,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:55,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953530573] [2022-11-03 02:36:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:55,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:55,396 INFO L87 Difference]: Start difference. First operand 531 states and 841 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:56,249 INFO L93 Difference]: Finished difference Result 1026 states and 1660 transitions. [2022-11-03 02:36:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:36:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2022-11-03 02:36:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:56,253 INFO L225 Difference]: With dead ends: 1026 [2022-11-03 02:36:56,253 INFO L226 Difference]: Without dead ends: 538 [2022-11-03 02:36:56,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:56,257 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 745 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:56,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1990 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:36:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-03 02:36:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-11-03 02:36:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.5823389021479715) internal successors, (663), 434 states have internal predecessors, (663), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2022-11-03 02:36:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 848 transitions. [2022-11-03 02:36:56,296 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 848 transitions. Word has length 122 [2022-11-03 02:36:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:56,296 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 848 transitions. [2022-11-03 02:36:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:36:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 848 transitions. [2022-11-03 02:36:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:36:56,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:56,301 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:56,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:56,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:56,518 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1337259497, now seen corresponding path program 1 times [2022-11-03 02:36:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291441263] [2022-11-03 02:36:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:56,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:56,520 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:56,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:36:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:36:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:36:56,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:56,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:56,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291441263] [2022-11-03 02:36:56,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291441263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:56,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:56,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:36:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632733518] [2022-11-03 02:36:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:36:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:36:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:36:56,983 INFO L87 Difference]: Start difference. First operand 538 states and 848 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:37:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:04,637 INFO L93 Difference]: Finished difference Result 1824 states and 2955 transitions. [2022-11-03 02:37:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:37:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2022-11-03 02:37:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:04,645 INFO L225 Difference]: With dead ends: 1824 [2022-11-03 02:37:04,645 INFO L226 Difference]: Without dead ends: 1329 [2022-11-03 02:37:04,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:37:04,647 INFO L413 NwaCegarLoop]: 1426 mSDtfsCounter, 1598 mSDsluCounter, 3594 mSDsCounter, 0 mSdLazyCounter, 6292 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 5020 SdHoareTripleChecker+Invalid, 6906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 6292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:04,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 5020 Invalid, 6906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 6292 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 02:37:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-11-03 02:37:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1107. [2022-11-03 02:37:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 840 states have (on average 1.5869047619047618) internal successors, (1333), 877 states have internal predecessors, (1333), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2022-11-03 02:37:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1774 transitions. [2022-11-03 02:37:04,725 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1774 transitions. Word has length 125 [2022-11-03 02:37:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:04,725 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1774 transitions. [2022-11-03 02:37:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:37:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1774 transitions. [2022-11-03 02:37:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:37:04,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:04,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:04,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:04,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:04,944 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1498210996, now seen corresponding path program 1 times [2022-11-03 02:37:04,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043814752] [2022-11-03 02:37:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:04,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:04,948 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:37:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:37:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:37:05,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:05,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043814752] [2022-11-03 02:37:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043814752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:05,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:37:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502975980] [2022-11-03 02:37:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:05,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:37:05,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:37:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:37:05,332 INFO L87 Difference]: Start difference. First operand 1107 states and 1774 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:37:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:05,584 INFO L93 Difference]: Finished difference Result 2141 states and 3455 transitions. [2022-11-03 02:37:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:37:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2022-11-03 02:37:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:05,590 INFO L225 Difference]: With dead ends: 2141 [2022-11-03 02:37:05,590 INFO L226 Difference]: Without dead ends: 1067 [2022-11-03 02:37:05,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:05,594 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 57 mSDsluCounter, 4654 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:05,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5436 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:37:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-11-03 02:37:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1064. [2022-11-03 02:37:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 808 states have (on average 1.5940594059405941) internal successors, (1288), 844 states have internal predecessors, (1288), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2022-11-03 02:37:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1710 transitions. [2022-11-03 02:37:05,657 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1710 transitions. Word has length 128 [2022-11-03 02:37:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:05,658 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1710 transitions. [2022-11-03 02:37:05,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:37:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1710 transitions. [2022-11-03 02:37:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:37:05,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:05,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:05,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:05,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:05,878 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -116011409, now seen corresponding path program 1 times [2022-11-03 02:37:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799945236] [2022-11-03 02:37:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:05,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:05,879 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:05,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:37:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:06,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:37:06,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:06,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:06,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799945236] [2022-11-03 02:37:06,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799945236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:06,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:06,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:37:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710214918] [2022-11-03 02:37:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:37:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:37:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:37:06,355 INFO L87 Difference]: Start difference. First operand 1064 states and 1710 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:37:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:10,107 INFO L93 Difference]: Finished difference Result 2663 states and 4331 transitions. [2022-11-03 02:37:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:37:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-11-03 02:37:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:10,118 INFO L225 Difference]: With dead ends: 2663 [2022-11-03 02:37:10,118 INFO L226 Difference]: Without dead ends: 1639 [2022-11-03 02:37:10,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:10,124 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 1911 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:10,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2011 Valid, 1871 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:37:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-11-03 02:37:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1598. [2022-11-03 02:37:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1203 states have (on average 1.597672485453034) internal successors, (1922), 1260 states have internal predecessors, (1922), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2022-11-03 02:37:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2591 transitions. [2022-11-03 02:37:10,258 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2591 transitions. Word has length 131 [2022-11-03 02:37:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:10,258 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 2591 transitions. [2022-11-03 02:37:10,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:37:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2591 transitions. [2022-11-03 02:37:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:37:10,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:10,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:10,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:10,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:10,478 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -823398580, now seen corresponding path program 1 times [2022-11-03 02:37:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:10,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730660085] [2022-11-03 02:37:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:10,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:10,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:10,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:37:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:37:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:37:10,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:10,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730660085] [2022-11-03 02:37:10,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730660085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:10,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:10,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593815761] [2022-11-03 02:37:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:10,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:10,899 INFO L87 Difference]: Start difference. First operand 1598 states and 2591 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:37:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:11,885 INFO L93 Difference]: Finished difference Result 4572 states and 7482 transitions. [2022-11-03 02:37:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:37:11,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2022-11-03 02:37:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:11,901 INFO L225 Difference]: With dead ends: 4572 [2022-11-03 02:37:11,901 INFO L226 Difference]: Without dead ends: 3014 [2022-11-03 02:37:11,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:11,910 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 652 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:11,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2644 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:37:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2022-11-03 02:37:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 2999. [2022-11-03 02:37:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2240 states have (on average 1.5758928571428572) internal successors, (3530), 2350 states have internal predecessors, (3530), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2022-11-03 02:37:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4817 transitions. [2022-11-03 02:37:12,158 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4817 transitions. Word has length 132 [2022-11-03 02:37:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:12,158 INFO L495 AbstractCegarLoop]: Abstraction has 2999 states and 4817 transitions. [2022-11-03 02:37:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:37:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4817 transitions. [2022-11-03 02:37:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:37:12,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:12,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:12,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:12,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash 709127910, now seen corresponding path program 1 times [2022-11-03 02:37:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862829799] [2022-11-03 02:37:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:12,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:12,380 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:12,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:37:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:12,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:37:12,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:12,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862829799] [2022-11-03 02:37:12,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862829799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:12,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:12,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:37:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331825509] [2022-11-03 02:37:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:12,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:12,843 INFO L87 Difference]: Start difference. First operand 2999 states and 4817 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:37:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:13,997 INFO L93 Difference]: Finished difference Result 8856 states and 14442 transitions. [2022-11-03 02:37:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:37:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-11-03 02:37:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:14,025 INFO L225 Difference]: With dead ends: 8856 [2022-11-03 02:37:14,025 INFO L226 Difference]: Without dead ends: 5897 [2022-11-03 02:37:14,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:14,054 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 756 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 2934 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:14,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 2934 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:37:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2022-11-03 02:37:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5871. [2022-11-03 02:37:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4386 states have (on average 1.5740994072047423) internal successors, (6904), 4605 states have internal predecessors, (6904), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1484), 1170 states have call predecessors, (1484), 1167 states have call successors, (1484) [2022-11-03 02:37:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9567 transitions. [2022-11-03 02:37:14,563 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9567 transitions. Word has length 134 [2022-11-03 02:37:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:14,563 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 9567 transitions. [2022-11-03 02:37:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:37:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9567 transitions. [2022-11-03 02:37:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:37:14,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:14,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:14,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:14,782 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1804339451, now seen corresponding path program 1 times [2022-11-03 02:37:14,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:14,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949797979] [2022-11-03 02:37:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:14,784 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:14,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:37:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:37:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:37:15,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:15,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:15,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949797979] [2022-11-03 02:37:15,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949797979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:15,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:15,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:37:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047396503] [2022-11-03 02:37:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:37:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:37:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:15,268 INFO L87 Difference]: Start difference. First operand 5871 states and 9567 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:37:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:17,017 INFO L93 Difference]: Finished difference Result 13333 states and 21729 transitions. [2022-11-03 02:37:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:37:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 134 [2022-11-03 02:37:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:17,078 INFO L225 Difference]: With dead ends: 13333 [2022-11-03 02:37:17,078 INFO L226 Difference]: Without dead ends: 9596 [2022-11-03 02:37:17,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:37:17,096 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 913 mSDsluCounter, 2851 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 3724 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:17,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 3724 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:37:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9596 states. [2022-11-03 02:37:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9596 to 9504. [2022-11-03 02:37:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 7147 states have (on average 1.5668112494753044) internal successors, (11198), 7487 states have internal predecessors, (11198), 1826 states have call successors, (1826), 471 states have call predecessors, (1826), 530 states have return successors, (2416), 1833 states have call predecessors, (2416), 1808 states have call successors, (2416) [2022-11-03 02:37:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 15440 transitions. [2022-11-03 02:37:17,813 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 15440 transitions. Word has length 134 [2022-11-03 02:37:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:17,814 INFO L495 AbstractCegarLoop]: Abstraction has 9504 states and 15440 transitions. [2022-11-03 02:37:17,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:37:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 15440 transitions. [2022-11-03 02:37:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 02:37:17,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:17,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:17,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:18,032 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 997153669, now seen corresponding path program 1 times [2022-11-03 02:37:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:18,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358465129] [2022-11-03 02:37:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:18,034 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:18,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:37:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:37:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:37:18,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:18,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358465129] [2022-11-03 02:37:18,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358465129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:18,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:18,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:37:18,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477355512] [2022-11-03 02:37:18,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:18,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:37:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:37:18,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:37:18,514 INFO L87 Difference]: Start difference. First operand 9504 states and 15440 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:37:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:23,865 INFO L93 Difference]: Finished difference Result 16786 states and 27308 transitions. [2022-11-03 02:37:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:37:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2022-11-03 02:37:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:23,940 INFO L225 Difference]: With dead ends: 16786 [2022-11-03 02:37:23,941 INFO L226 Difference]: Without dead ends: 9610 [2022-11-03 02:37:23,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:23,981 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 1971 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:23,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 2422 Invalid, 3960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 02:37:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2022-11-03 02:37:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 9456. [2022-11-03 02:37:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9456 states, 7121 states have (on average 1.5666338997331835) internal successors, (11156), 7459 states have internal predecessors, (11156), 1810 states have call successors, (1810), 467 states have call predecessors, (1810), 524 states have return successors, (2396), 1817 states have call predecessors, (2396), 1792 states have call successors, (2396) [2022-11-03 02:37:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9456 states to 9456 states and 15362 transitions. [2022-11-03 02:37:24,841 INFO L78 Accepts]: Start accepts. Automaton has 9456 states and 15362 transitions. Word has length 136 [2022-11-03 02:37:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:24,841 INFO L495 AbstractCegarLoop]: Abstraction has 9456 states and 15362 transitions. [2022-11-03 02:37:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:37:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9456 states and 15362 transitions. [2022-11-03 02:37:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:37:24,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:24,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:24,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:25,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:25,060 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash -928676863, now seen corresponding path program 1 times [2022-11-03 02:37:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:25,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108687753] [2022-11-03 02:37:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:25,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:25,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:25,063 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:25,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:37:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:37:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:37:25,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:25,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108687753] [2022-11-03 02:37:25,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108687753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:25,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:25,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:37:25,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884369669] [2022-11-03 02:37:25,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:25,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:37:25,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:37:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:25,634 INFO L87 Difference]: Start difference. First operand 9456 states and 15362 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:37:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:27,498 INFO L93 Difference]: Finished difference Result 16802 states and 27220 transitions. [2022-11-03 02:37:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:37:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-11-03 02:37:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:27,547 INFO L225 Difference]: With dead ends: 16802 [2022-11-03 02:37:27,547 INFO L226 Difference]: Without dead ends: 9504 [2022-11-03 02:37:27,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:27,575 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 663 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:27,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 3397 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:37:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9504 states. [2022-11-03 02:37:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9504 to 9474. [2022-11-03 02:37:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9474 states, 7133 states have (on average 1.5639983176783963) internal successors, (11156), 7477 states have internal predecessors, (11156), 1810 states have call successors, (1810), 467 states have call predecessors, (1810), 530 states have return successors, (2402), 1817 states have call predecessors, (2402), 1792 states have call successors, (2402) [2022-11-03 02:37:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9474 states to 9474 states and 15368 transitions. [2022-11-03 02:37:28,385 INFO L78 Accepts]: Start accepts. Automaton has 9474 states and 15368 transitions. Word has length 139 [2022-11-03 02:37:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:28,386 INFO L495 AbstractCegarLoop]: Abstraction has 9474 states and 15368 transitions. [2022-11-03 02:37:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:37:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 9474 states and 15368 transitions. [2022-11-03 02:37:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:37:28,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:28,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:28,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:28,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:28,606 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1028593816, now seen corresponding path program 1 times [2022-11-03 02:37:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:28,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196457027] [2022-11-03 02:37:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:28,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:28,609 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:28,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:37:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:37:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:37:28,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:28,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:28,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196457027] [2022-11-03 02:37:28,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196457027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:28,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:28,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:37:28,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315709338] [2022-11-03 02:37:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:28,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:28,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:28,999 INFO L87 Difference]: Start difference. First operand 9474 states and 15368 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 02:37:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:30,093 INFO L93 Difference]: Finished difference Result 17662 states and 28856 transitions. [2022-11-03 02:37:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:37:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2022-11-03 02:37:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:30,146 INFO L225 Difference]: With dead ends: 17662 [2022-11-03 02:37:30,146 INFO L226 Difference]: Without dead ends: 9488 [2022-11-03 02:37:30,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:37:30,181 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 404 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:30,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2895 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:37:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9488 states. [2022-11-03 02:37:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9488 to 9476. [2022-11-03 02:37:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 7134 states have (on average 1.5403700588730025) internal successors, (10989), 7479 states have internal predecessors, (10989), 1810 states have call successors, (1810), 467 states have call predecessors, (1810), 531 states have return successors, (2404), 1817 states have call predecessors, (2404), 1792 states have call successors, (2404) [2022-11-03 02:37:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 15203 transitions. [2022-11-03 02:37:31,111 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 15203 transitions. Word has length 146 [2022-11-03 02:37:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:31,112 INFO L495 AbstractCegarLoop]: Abstraction has 9476 states and 15203 transitions. [2022-11-03 02:37:31,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 02:37:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 15203 transitions. [2022-11-03 02:37:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 02:37:31,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:31,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:31,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:37:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:31,317 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1050870202, now seen corresponding path program 1 times [2022-11-03 02:37:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748154273] [2022-11-03 02:37:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:31,320 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:31,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:37:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:37:31,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:31,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748154273] [2022-11-03 02:37:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748154273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:31,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:31,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:37:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100987531] [2022-11-03 02:37:31,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:31,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:37:31,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:37:31,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:37:31,885 INFO L87 Difference]: Start difference. First operand 9476 states and 15203 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:37:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:33,155 INFO L93 Difference]: Finished difference Result 16412 states and 26594 transitions. [2022-11-03 02:37:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:37:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2022-11-03 02:37:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:33,208 INFO L225 Difference]: With dead ends: 16412 [2022-11-03 02:37:33,208 INFO L226 Difference]: Without dead ends: 9622 [2022-11-03 02:37:33,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:37:33,239 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 706 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:33,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 3291 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:37:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2022-11-03 02:37:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 9560. [2022-11-03 02:37:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 7182 states have (on average 1.5367585630743525) internal successors, (11037), 7551 states have internal predecessors, (11037), 1834 states have call successors, (1834), 479 states have call predecessors, (1834), 543 states have return successors, (2506), 1817 states have call predecessors, (2506), 1816 states have call successors, (2506) [2022-11-03 02:37:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 15377 transitions. [2022-11-03 02:37:33,986 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 15377 transitions. Word has length 151 [2022-11-03 02:37:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:33,987 INFO L495 AbstractCegarLoop]: Abstraction has 9560 states and 15377 transitions. [2022-11-03 02:37:33,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:37:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 15377 transitions. [2022-11-03 02:37:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 02:37:33,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:33,990 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:34,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 02:37:34,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:34,191 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1401758162, now seen corresponding path program 1 times [2022-11-03 02:37:34,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179655849] [2022-11-03 02:37:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:34,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:34,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:34,193 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:34,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:37:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:37:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:37:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:37:35,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179655849] [2022-11-03 02:37:35,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179655849] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:35,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:35,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2022-11-03 02:37:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517807412] [2022-11-03 02:37:35,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:35,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:37:35,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:37:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:37:35,186 INFO L87 Difference]: Start difference. First operand 9560 states and 15377 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:37:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:39,695 INFO L93 Difference]: Finished difference Result 18790 states and 30425 transitions. [2022-11-03 02:37:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:37:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2022-11-03 02:37:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:39,767 INFO L225 Difference]: With dead ends: 18790 [2022-11-03 02:37:39,767 INFO L226 Difference]: Without dead ends: 11914 [2022-11-03 02:37:39,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:37:39,805 INFO L413 NwaCegarLoop]: 912 mSDtfsCounter, 1457 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:39,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 2500 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:37:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11914 states. [2022-11-03 02:37:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11914 to 11194. [2022-11-03 02:37:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11194 states, 8479 states have (on average 1.5223493336478358) internal successors, (12908), 8873 states have internal predecessors, (12908), 2028 states have call successors, (2028), 603 states have call predecessors, (2028), 686 states have return successors, (2846), 1993 states have call predecessors, (2846), 2010 states have call successors, (2846) [2022-11-03 02:37:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11194 states to 11194 states and 17782 transitions. [2022-11-03 02:37:41,242 INFO L78 Accepts]: Start accepts. Automaton has 11194 states and 17782 transitions. Word has length 156 [2022-11-03 02:37:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:41,243 INFO L495 AbstractCegarLoop]: Abstraction has 11194 states and 17782 transitions. [2022-11-03 02:37:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:37:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11194 states and 17782 transitions. [2022-11-03 02:37:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 02:37:41,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:41,247 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:41,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:41,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:41,455 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2103358036, now seen corresponding path program 1 times [2022-11-03 02:37:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245487951] [2022-11-03 02:37:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:41,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:41,457 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:41,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:37:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:37:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:37:42,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:42,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245487951] [2022-11-03 02:37:42,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245487951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:42,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:42,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:37:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683505187] [2022-11-03 02:37:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:37:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:37:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:37:42,062 INFO L87 Difference]: Start difference. First operand 11194 states and 17782 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:37:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:47,880 INFO L93 Difference]: Finished difference Result 22282 states and 35746 transitions. [2022-11-03 02:37:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:37:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2022-11-03 02:37:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:47,923 INFO L225 Difference]: With dead ends: 22282 [2022-11-03 02:37:47,923 INFO L226 Difference]: Without dead ends: 6319 [2022-11-03 02:37:47,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:37:47,989 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 1749 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 3773 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 4224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:47,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1850 Valid, 2733 Invalid, 4224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3773 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:37:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2022-11-03 02:37:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 6263. [2022-11-03 02:37:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6263 states, 4865 states have (on average 1.5350462487153134) internal successors, (7468), 5066 states have internal predecessors, (7468), 1007 states have call successors, (1007), 364 states have call predecessors, (1007), 390 states have return successors, (1349), 969 states have call predecessors, (1349), 1001 states have call successors, (1349) [2022-11-03 02:37:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6263 states to 6263 states and 9824 transitions. [2022-11-03 02:37:48,679 INFO L78 Accepts]: Start accepts. Automaton has 6263 states and 9824 transitions. Word has length 156 [2022-11-03 02:37:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:48,680 INFO L495 AbstractCegarLoop]: Abstraction has 6263 states and 9824 transitions. [2022-11-03 02:37:48,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:37:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6263 states and 9824 transitions. [2022-11-03 02:37:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 02:37:48,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:48,701 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:48,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:48,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:48,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1057197778, now seen corresponding path program 1 times [2022-11-03 02:37:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:48,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383313664] [2022-11-03 02:37:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:48,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:48,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:48,921 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:48,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:37:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2022-11-03 02:37:49,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:49,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:49,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383313664] [2022-11-03 02:37:49,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383313664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:49,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:49,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:37:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985174696] [2022-11-03 02:37:49,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:49,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:37:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:37:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:49,696 INFO L87 Difference]: Start difference. First operand 6263 states and 9824 transitions. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:37:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:50,186 INFO L93 Difference]: Finished difference Result 12564 states and 19977 transitions. [2022-11-03 02:37:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:37:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 483 [2022-11-03 02:37:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:50,229 INFO L225 Difference]: With dead ends: 12564 [2022-11-03 02:37:50,229 INFO L226 Difference]: Without dead ends: 6698 [2022-11-03 02:37:50,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:37:50,261 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 62 mSDsluCounter, 3183 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:50,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3997 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:37:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2022-11-03 02:37:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 6318. [2022-11-03 02:37:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6318 states, 4909 states have (on average 1.5302505601955592) internal successors, (7512), 5110 states have internal predecessors, (7512), 1007 states have call successors, (1007), 364 states have call predecessors, (1007), 401 states have return successors, (1366), 980 states have call predecessors, (1366), 1001 states have call successors, (1366) [2022-11-03 02:37:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6318 states to 6318 states and 9885 transitions. [2022-11-03 02:37:51,013 INFO L78 Accepts]: Start accepts. Automaton has 6318 states and 9885 transitions. Word has length 483 [2022-11-03 02:37:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:51,013 INFO L495 AbstractCegarLoop]: Abstraction has 6318 states and 9885 transitions. [2022-11-03 02:37:51,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:37:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 6318 states and 9885 transitions. [2022-11-03 02:37:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-11-03 02:37:51,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:51,033 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:37:51,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:51,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:51,257 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1892964182, now seen corresponding path program 1 times [2022-11-03 02:37:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191179644] [2022-11-03 02:37:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:51,259 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:51,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:37:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:37:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2022-11-03 02:37:52,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:52,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:52,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191179644] [2022-11-03 02:37:52,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191179644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:52,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:52,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:37:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446056494] [2022-11-03 02:37:52,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:37:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:37:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:37:52,264 INFO L87 Difference]: Start difference. First operand 6318 states and 9885 transitions. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 02:37:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:57,783 INFO L93 Difference]: Finished difference Result 16988 states and 27069 transitions. [2022-11-03 02:37:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:37:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 486 [2022-11-03 02:37:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:57,833 INFO L225 Difference]: With dead ends: 16988 [2022-11-03 02:37:57,833 INFO L226 Difference]: Without dead ends: 10651 [2022-11-03 02:37:57,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:37:57,868 INFO L413 NwaCegarLoop]: 1299 mSDtfsCounter, 2357 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 3994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:57,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 2409 Invalid, 3994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:37:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2022-11-03 02:37:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10194. [2022-11-03 02:37:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 7832 states have (on average 1.5181307456588355) internal successors, (11890), 8173 states have internal predecessors, (11890), 1668 states have call successors, (1668), 635 states have call predecessors, (1668), 693 states have return successors, (2406), 1604 states have call predecessors, (2406), 1660 states have call successors, (2406) [2022-11-03 02:37:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 15964 transitions. [2022-11-03 02:37:58,994 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 15964 transitions. Word has length 486 [2022-11-03 02:37:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:58,994 INFO L495 AbstractCegarLoop]: Abstraction has 10194 states and 15964 transitions. [2022-11-03 02:37:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 02:37:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 15964 transitions. [2022-11-03 02:37:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-11-03 02:37:59,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:59,016 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:37:59,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 02:37:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:59,217 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash 629600737, now seen corresponding path program 1 times [2022-11-03 02:37:59,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:59,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123635259] [2022-11-03 02:37:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:59,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:59,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:59,220 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:59,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:37:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:37:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-11-03 02:37:59,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:37:59,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123635259] [2022-11-03 02:37:59,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123635259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:59,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:37:59,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:37:59,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498221500] [2022-11-03 02:37:59,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:37:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:37:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:37:59,902 INFO L87 Difference]: Start difference. First operand 10194 states and 15964 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:38:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:01,164 INFO L93 Difference]: Finished difference Result 21097 states and 33440 transitions. [2022-11-03 02:38:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:38:01,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 457 [2022-11-03 02:38:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:01,214 INFO L225 Difference]: With dead ends: 21097 [2022-11-03 02:38:01,214 INFO L226 Difference]: Without dead ends: 11149 [2022-11-03 02:38:01,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:38:01,244 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 165 mSDsluCounter, 3286 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4141 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:01,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4141 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2022-11-03 02:38:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 10347. [2022-11-03 02:38:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10347 states, 7867 states have (on average 1.5173509597050971) internal successors, (11937), 8252 states have internal predecessors, (11937), 1804 states have call successors, (1804), 609 states have call predecessors, (1804), 675 states have return successors, (2538), 1752 states have call predecessors, (2538), 1796 states have call successors, (2538) [2022-11-03 02:38:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 16279 transitions. [2022-11-03 02:38:02,300 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 16279 transitions. Word has length 457 [2022-11-03 02:38:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:02,300 INFO L495 AbstractCegarLoop]: Abstraction has 10347 states and 16279 transitions. [2022-11-03 02:38:02,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:38:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 16279 transitions. [2022-11-03 02:38:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-11-03 02:38:02,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:02,319 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:38:02,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:38:02,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:02,519 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1045175995, now seen corresponding path program 1 times [2022-11-03 02:38:02,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:02,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165038748] [2022-11-03 02:38:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:02,522 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:02,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:38:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:38:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 798 proven. 29 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 02:38:03,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 70 proven. 116 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-11-03 02:38:04,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165038748] [2022-11-03 02:38:04,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165038748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270480941] [2022-11-03 02:38:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:04,420 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:04,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:38:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 825 proven. 147 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-11-03 02:38:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2022-11-03 02:38:05,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270480941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264421651] [2022-11-03 02:38:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:05,930 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:05,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:38:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:38:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 798 proven. 29 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 02:38:06,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 70 proven. 116 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-11-03 02:38:07,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264421651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:07,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:07,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 5, 5, 9, 11] total 21 [2022-11-03 02:38:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810108098] [2022-11-03 02:38:07,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:38:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:38:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:38:07,291 INFO L87 Difference]: Start difference. First operand 10347 states and 16279 transitions. Second operand has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) [2022-11-03 02:39:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:23,662 INFO L93 Difference]: Finished difference Result 74614 states and 127635 transitions. [2022-11-03 02:39:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-03 02:39:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) Word has length 460 [2022-11-03 02:39:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:24,156 INFO L225 Difference]: With dead ends: 74614 [2022-11-03 02:39:24,156 INFO L226 Difference]: Without dead ends: 63793 [2022-11-03 02:39:24,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3029 GetRequests, 2809 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20995 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5350, Invalid=43712, Unknown=0, NotChecked=0, Total=49062 [2022-11-03 02:39:24,534 INFO L413 NwaCegarLoop]: 1914 mSDtfsCounter, 25562 mSDsluCounter, 7156 mSDsCounter, 0 mSdLazyCounter, 24490 mSolverCounterSat, 14436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25689 SdHoareTripleChecker+Valid, 9070 SdHoareTripleChecker+Invalid, 38926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 14436 IncrementalHoareTripleChecker+Valid, 24490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:24,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25689 Valid, 9070 Invalid, 38926 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [14436 Valid, 24490 Invalid, 0 Unknown, 0 Unchecked, 60.8s Time] [2022-11-03 02:39:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63793 states. [2022-11-03 02:39:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63793 to 47784. [2022-11-03 02:39:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47784 states, 35636 states have (on average 1.4228869682343697) internal successors, (50706), 37317 states have internal predecessors, (50706), 8476 states have call successors, (8476), 3313 states have call predecessors, (8476), 3671 states have return successors, (14482), 8042 states have call predecessors, (14482), 8444 states have call successors, (14482) [2022-11-03 02:39:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47784 states to 47784 states and 73664 transitions. [2022-11-03 02:39:30,486 INFO L78 Accepts]: Start accepts. Automaton has 47784 states and 73664 transitions. Word has length 460 [2022-11-03 02:39:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:30,487 INFO L495 AbstractCegarLoop]: Abstraction has 47784 states and 73664 transitions. [2022-11-03 02:39:30,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) [2022-11-03 02:39:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 47784 states and 73664 transitions. [2022-11-03 02:39:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-03 02:39:30,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:30,557 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:30,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:30,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 02:39:30,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 02:39:31,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:31,163 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1188472817, now seen corresponding path program 1 times [2022-11-03 02:39:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:31,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144313177] [2022-11-03 02:39:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:31,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:31,166 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:39:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:39:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 717 proven. 27 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-11-03 02:39:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 02:39:33,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:33,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144313177] [2022-11-03 02:39:33,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144313177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:33,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1568127356] [2022-11-03 02:39:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:33,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:33,901 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:33,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14cea4a0-c1b9-4480-a99c-ac5381bb0c26/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:39:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:39:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-03 02:39:34,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:34,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1568127356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:34,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:39:34,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11] total 22 [2022-11-03 02:39:34,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648699093] [2022-11-03 02:39:34,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:34,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:39:34,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:39:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:39:34,828 INFO L87 Difference]: Start difference. First operand 47784 states and 73664 transitions. Second operand has 9 states, 8 states have (on average 27.125) internal successors, (217), 9 states have internal predecessors, (217), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-03 02:39:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:44,955 INFO L93 Difference]: Finished difference Result 116165 states and 184953 transitions. [2022-11-03 02:39:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:39:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 27.125) internal successors, (217), 9 states have internal predecessors, (217), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 478 [2022-11-03 02:39:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:45,384 INFO L225 Difference]: With dead ends: 116165 [2022-11-03 02:39:45,385 INFO L226 Difference]: Without dead ends: 70034 [2022-11-03 02:39:45,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1414 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:39:45,823 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 837 mSDsluCounter, 6166 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 7120 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:45,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 7120 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:39:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70034 states.