./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0 --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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- 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-e04fb08 [2022-11-16 19:58:48,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:58:48,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:58:48,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:58:48,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:58:48,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:58:48,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:58:48,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:58:48,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:58:48,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:58:48,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:58:48,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:58:48,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:58:48,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:58:48,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:58:48,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:58:48,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:58:48,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:58:48,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:58:48,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:58:48,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:58:48,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:58:48,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:58:48,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:58:48,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:58:48,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:58:48,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:58:48,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:58:48,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:58:48,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:58:48,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:58:48,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:58:48,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:58:48,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:58:48,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:58:48,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:58:48,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:58:48,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:58:48,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:58:48,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:58:48,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:58:48,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:58:48,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:58:48,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:58:48,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:58:48,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:58:48,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:58:48,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:58:48,637 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:58:48,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:58:48,637 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:58:48,638 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:58:48,638 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:58:48,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:58:48,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:58:48,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:58:48,639 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:58:48,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:58:48,640 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:58:48,640 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:58:48,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:58:48,641 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:58:48,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:58:48,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:58:48,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:58:48,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:58:48,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:58:48,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:58:48,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:58:48,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:58:48,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:58:48,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:58:48,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:58:48,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:58:48,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:58:48,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:58:48,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:58:48,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:58:48,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:58:48,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:58:48,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:58:48,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:58:48,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:58:48,654 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_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2022-11-16 19:58:48,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:58:48,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:58:48,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:58:48,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:58:48,918 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:58:48,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-16 19:58:48,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/data/f82f5cd97/49e28cba9ef34a5f868f30e19384a95e/FLAGcbdc77a3a [2022-11-16 19:58:49,571 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:58:49,572 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-11-16 19:58:49,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/data/f82f5cd97/49e28cba9ef34a5f868f30e19384a95e/FLAGcbdc77a3a [2022-11-16 19:58:49,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/data/f82f5cd97/49e28cba9ef34a5f868f30e19384a95e [2022-11-16 19:58:49,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:58:49,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:58:49,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:58:49,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:58:49,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:58:49,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:58:49" (1/1) ... [2022-11-16 19:58:49,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dcaac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:49, skipping insertion in model container [2022-11-16 19:58:49,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:58:49" (1/1) ... [2022-11-16 19:58:49,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:58:49,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:58:50,235 WARN L229 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_f339328c-9f25-4d8a-9be0-249758905c0d/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-16 19:58:50,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:58:50,428 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:58:50,518 WARN L229 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_f339328c-9f25-4d8a-9be0-249758905c0d/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-11-16 19:58:50,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:58:50,589 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:58:50,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50 WrapperNode [2022-11-16 19:58:50,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:58:50,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:58:50,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:58:50,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:58:50,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,685 INFO L138 Inliner]: procedures = 90, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 1043 [2022-11-16 19:58:50,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:58:50,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:58:50,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:58:50,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:58:50,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:58:50,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:58:50,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:58:50,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:58:50,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (1/1) ... [2022-11-16 19:58:50,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:58:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:50,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:58:50,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:58:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:58:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-16 19:58:50,914 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-16 19:58:50,914 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-16 19:58:50,914 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-16 19:58:50,914 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-16 19:58:50,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-16 19:58:50,914 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-16 19:58:50,915 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-16 19:58:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-16 19:58:50,915 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-16 19:58:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-16 19:58:50,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-16 19:58:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-16 19:58:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-16 19:58:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-16 19:58:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-16 19:58:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-16 19:58:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-16 19:58:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-16 19:58:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-16 19:58:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-16 19:58:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-16 19:58:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-16 19:58:50,918 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-16 19:58:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-16 19:58:50,918 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-16 19:58:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-16 19:58:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-16 19:58:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-16 19:58:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-16 19:58:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-16 19:58:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-16 19:58:50,919 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-16 19:58:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-16 19:58:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-16 19:58:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-16 19:58:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-16 19:58:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-16 19:58:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-16 19:58:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-16 19:58:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-16 19:58:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-16 19:58:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:58:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-16 19:58:50,922 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-16 19:58:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-16 19:58:50,924 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-16 19:58:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-16 19:58:50,925 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-16 19:58:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-16 19:58:50,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-16 19:58:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:58:50,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:58:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-16 19:58:50,926 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-16 19:58:51,138 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:58:51,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:58:52,334 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:58:53,062 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:58:53,062 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 19:58:53,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:58:53 BoogieIcfgContainer [2022-11-16 19:58:53,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:58:53,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:58:53,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:58:53,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:58:53,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:58:49" (1/3) ... [2022-11-16 19:58:53,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c43aef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:58:53, skipping insertion in model container [2022-11-16 19:58:53,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:50" (2/3) ... [2022-11-16 19:58:53,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c43aef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:58:53, skipping insertion in model container [2022-11-16 19:58:53,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:58:53" (3/3) ... [2022-11-16 19:58:53,078 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2022-11-16 19:58:53,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:58:53,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:58:53,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:58:53,212 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;@23d0e91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:58:53,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:58:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-11-16 19:58:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 19:58:53,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:53,254 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:58:53,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash -336537817, now seen corresponding path program 1 times [2022-11-16 19:58:53,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862852951] [2022-11-16 19:58:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:58:54,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:54,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862852951] [2022-11-16 19:58:54,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862852951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:54,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849874248] [2022-11-16 19:58:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:54,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:54,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:54,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:58:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:58:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:58:54,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:58:54,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849874248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:54,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:58:54,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:58:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475835286] [2022-11-16 19:58:54,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:54,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:58:54,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:58:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:58:54,917 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:58:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:55,276 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2022-11-16 19:58:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:58:55,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-16 19:58:55,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:55,309 INFO L225 Difference]: With dead ends: 1135 [2022-11-16 19:58:55,310 INFO L226 Difference]: Without dead ends: 733 [2022-11-16 19:58:55,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:58:55,355 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 506 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:55,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1286 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:58:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-16 19:58:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2022-11-16 19:58:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2022-11-16 19:58:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2022-11-16 19:58:55,509 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 87 [2022-11-16 19:58:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:55,510 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2022-11-16 19:58:55,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:58:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2022-11-16 19:58:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 19:58:55,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:55,519 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:58:55,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 19:58:55,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -903324750, now seen corresponding path program 1 times [2022-11-16 19:58:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84783038] [2022-11-16 19:58:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:58:56,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84783038] [2022-11-16 19:58:56,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84783038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:56,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58240276] [2022-11-16 19:58:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:56,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:56,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:56,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:56,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:58:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:56,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:58:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:58:56,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:58:56,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58240276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:56,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:58:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:58:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259369727] [2022-11-16 19:58:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:56,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:58:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:58:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:58:56,699 INFO L87 Difference]: Start difference. First operand 721 states and 1139 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 19:58:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:56,887 INFO L93 Difference]: Finished difference Result 1765 states and 2819 transitions. [2022-11-16 19:58:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:58:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-16 19:58:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:56,895 INFO L225 Difference]: With dead ends: 1765 [2022-11-16 19:58:56,895 INFO L226 Difference]: Without dead ends: 1056 [2022-11-16 19:58:56,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:58:56,900 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 561 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:56,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1175 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-16 19:58:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1032. [2022-11-16 19:58:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 701 states have (on average 1.5748930099857346) internal successors, (1104), 747 states have internal predecessors, (1104), 265 states have call successors, (265), 65 states have call predecessors, (265), 65 states have return successors, (272), 258 states have call predecessors, (272), 262 states have call successors, (272) [2022-11-16 19:58:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1641 transitions. [2022-11-16 19:58:56,966 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1641 transitions. Word has length 86 [2022-11-16 19:58:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:56,967 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1641 transitions. [2022-11-16 19:58:56,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 19:58:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1641 transitions. [2022-11-16 19:58:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 19:58:56,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:56,972 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:58:56,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:57,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1454362349, now seen corresponding path program 1 times [2022-11-16 19:58:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:57,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749616251] [2022-11-16 19:58:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:58:57,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:57,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749616251] [2022-11-16 19:58:57,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749616251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:57,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:58:57,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:58:57,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604975529] [2022-11-16 19:58:57,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:57,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:58:57,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:58:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:58:57,703 INFO L87 Difference]: Start difference. First operand 1032 states and 1641 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:58:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:58,919 INFO L93 Difference]: Finished difference Result 3493 states and 5724 transitions. [2022-11-16 19:58:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:58:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-16 19:58:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:58,942 INFO L225 Difference]: With dead ends: 3493 [2022-11-16 19:58:58,942 INFO L226 Difference]: Without dead ends: 2473 [2022-11-16 19:58:58,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:58:58,959 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 825 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:58,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 4216 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:58:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-11-16 19:58:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1930. [2022-11-16 19:58:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5818997756170532) internal successors, (2115), 1425 states have internal predecessors, (2115), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2022-11-16 19:58:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3108 transitions. [2022-11-16 19:58:59,130 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3108 transitions. Word has length 87 [2022-11-16 19:58:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:59,131 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3108 transitions. [2022-11-16 19:58:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:58:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3108 transitions. [2022-11-16 19:58:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 19:58:59,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:59,139 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:58:59,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:58:59,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1056566648, now seen corresponding path program 1 times [2022-11-16 19:58:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837565734] [2022-11-16 19:58:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:58:59,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837565734] [2022-11-16 19:58:59,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837565734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:59,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385458510] [2022-11-16 19:58:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:59,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:59,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:58:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:58:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:59:00,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:00,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385458510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:00,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:00,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:59:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821007115] [2022-11-16 19:59:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:59:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:59:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:00,008 INFO L87 Difference]: Start difference. First operand 1930 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:59:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:00,472 INFO L93 Difference]: Finished difference Result 5530 states and 9011 transitions. [2022-11-16 19:59:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:59:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-16 19:59:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:00,492 INFO L225 Difference]: With dead ends: 5530 [2022-11-16 19:59:00,492 INFO L226 Difference]: Without dead ends: 3613 [2022-11-16 19:59:00,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:00,506 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 493 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:00,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:59:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-11-16 19:59:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2022-11-16 19:59:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5306536743808363) internal successors, (3770), 2637 states have internal predecessors, (3770), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2022-11-16 19:59:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5689 transitions. [2022-11-16 19:59:00,734 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5689 transitions. Word has length 88 [2022-11-16 19:59:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:00,734 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5689 transitions. [2022-11-16 19:59:00,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:59:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5689 transitions. [2022-11-16 19:59:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 19:59:00,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:00,738 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:59:00,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:00,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:00,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 766299694, now seen corresponding path program 1 times [2022-11-16 19:59:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:00,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624065509] [2022-11-16 19:59:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:59:01,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624065509] [2022-11-16 19:59:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624065509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866962734] [2022-11-16 19:59:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:01,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:01,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:59:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:59:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:59:01,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:01,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866962734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:01,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:01,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-16 19:59:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506902753] [2022-11-16 19:59:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:59:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:59:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:59:01,744 INFO L87 Difference]: Start difference. First operand 3585 states and 5689 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 19:59:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:02,887 INFO L93 Difference]: Finished difference Result 7326 states and 11781 transitions. [2022-11-16 19:59:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:59:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-16 19:59:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:02,915 INFO L225 Difference]: With dead ends: 7326 [2022-11-16 19:59:02,915 INFO L226 Difference]: Without dead ends: 3753 [2022-11-16 19:59:02,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:59:02,947 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 639 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:02,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 3283 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:59:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-16 19:59:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3735. [2022-11-16 19:59:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 2503 states have (on average 1.5101877746703956) internal successors, (3780), 2725 states have internal predecessors, (3780), 1014 states have call successors, (1014), 214 states have call predecessors, (1014), 217 states have return successors, (1204), 931 states have call predecessors, (1204), 1008 states have call successors, (1204) [2022-11-16 19:59:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5998 transitions. [2022-11-16 19:59:03,263 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5998 transitions. Word has length 89 [2022-11-16 19:59:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:03,264 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 5998 transitions. [2022-11-16 19:59:03,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 19:59:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5998 transitions. [2022-11-16 19:59:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 19:59:03,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:03,267 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:59:03,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:03,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:03,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:03,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1544903673, now seen corresponding path program 1 times [2022-11-16 19:59:03,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:03,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809937117] [2022-11-16 19:59:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:03,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:59:03,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809937117] [2022-11-16 19:59:03,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809937117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692418746] [2022-11-16 19:59:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:03,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:03,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:59:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:59:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:59:04,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:04,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692418746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:04,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:04,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:59:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651141823] [2022-11-16 19:59:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:59:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:59:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:04,326 INFO L87 Difference]: Start difference. First operand 3735 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:59:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:04,893 INFO L93 Difference]: Finished difference Result 8179 states and 13214 transitions. [2022-11-16 19:59:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:59:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-16 19:59:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:04,931 INFO L225 Difference]: With dead ends: 8179 [2022-11-16 19:59:04,931 INFO L226 Difference]: Without dead ends: 4456 [2022-11-16 19:59:04,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:04,966 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 559 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:04,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1274 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:59:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2022-11-16 19:59:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3672. [2022-11-16 19:59:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2460 states have (on average 1.5089430894308944) internal successors, (3712), 2681 states have internal predecessors, (3712), 1002 states have call successors, (1002), 210 states have call predecessors, (1002), 209 states have return successors, (1151), 916 states have call predecessors, (1151), 996 states have call successors, (1151) [2022-11-16 19:59:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5865 transitions. [2022-11-16 19:59:05,323 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5865 transitions. Word has length 88 [2022-11-16 19:59:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:05,324 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 5865 transitions. [2022-11-16 19:59:05,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:59:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5865 transitions. [2022-11-16 19:59:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 19:59:05,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:05,328 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:05,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:05,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1736239229, now seen corresponding path program 1 times [2022-11-16 19:59:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881576918] [2022-11-16 19:59:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:59:06,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881576918] [2022-11-16 19:59:06,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881576918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:06,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025745504] [2022-11-16 19:59:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:06,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:06,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:06,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:59:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:59:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:07,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:07,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025745504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:07,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:07,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-16 19:59:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697800378] [2022-11-16 19:59:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:59:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:59:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:59:07,111 INFO L87 Difference]: Start difference. First operand 3672 states and 5865 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-16 19:59:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:10,039 INFO L93 Difference]: Finished difference Result 9118 states and 14875 transitions. [2022-11-16 19:59:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:59:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-16 19:59:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:10,088 INFO L225 Difference]: With dead ends: 9118 [2022-11-16 19:59:10,088 INFO L226 Difference]: Without dead ends: 5458 [2022-11-16 19:59:10,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:59:10,118 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 1610 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:10,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 2433 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 19:59:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2022-11-16 19:59:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 4012. [2022-11-16 19:59:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4012 states, 2716 states have (on average 1.4911634756995582) internal successors, (4050), 2945 states have internal predecessors, (4050), 1062 states have call successors, (1062), 238 states have call predecessors, (1062), 233 states have return successors, (1213), 964 states have call predecessors, (1213), 1056 states have call successors, (1213) [2022-11-16 19:59:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 6325 transitions. [2022-11-16 19:59:10,525 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 6325 transitions. Word has length 94 [2022-11-16 19:59:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:10,526 INFO L495 AbstractCegarLoop]: Abstraction has 4012 states and 6325 transitions. [2022-11-16 19:59:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-16 19:59:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 6325 transitions. [2022-11-16 19:59:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 19:59:10,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:10,531 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:10,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:59:10,740 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 734653633, now seen corresponding path program 1 times [2022-11-16 19:59:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895855538] [2022-11-16 19:59:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:59:11,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895855538] [2022-11-16 19:59:11,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895855538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935031753] [2022-11-16 19:59:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:11,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:11,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:11,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:11,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:59:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:59:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:59:12,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:12,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935031753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:12,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:12,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-16 19:59:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280569441] [2022-11-16 19:59:12,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:12,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:59:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:59:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:59:12,016 INFO L87 Difference]: Start difference. First operand 4012 states and 6325 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 19:59:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:12,750 INFO L93 Difference]: Finished difference Result 8369 states and 13490 transitions. [2022-11-16 19:59:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:59:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-16 19:59:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:12,786 INFO L225 Difference]: With dead ends: 8369 [2022-11-16 19:59:12,793 INFO L226 Difference]: Without dead ends: 5178 [2022-11-16 19:59:12,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:59:12,812 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 139 mSDsluCounter, 2493 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:59:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2022-11-16 19:59:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 4236. [2022-11-16 19:59:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 2868 states have (on average 1.4853556485355648) internal successors, (4260), 3118 states have internal predecessors, (4260), 1121 states have call successors, (1121), 238 states have call predecessors, (1121), 246 states have return successors, (1312), 1033 states have call predecessors, (1312), 1115 states have call successors, (1312) [2022-11-16 19:59:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 6693 transitions. [2022-11-16 19:59:13,206 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 6693 transitions. Word has length 99 [2022-11-16 19:59:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:13,207 INFO L495 AbstractCegarLoop]: Abstraction has 4236 states and 6693 transitions. [2022-11-16 19:59:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-16 19:59:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 6693 transitions. [2022-11-16 19:59:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 19:59:13,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:13,211 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:13,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:13,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:59:13,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 247143736, now seen corresponding path program 1 times [2022-11-16 19:59:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684803242] [2022-11-16 19:59:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:13,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 19:59:14,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684803242] [2022-11-16 19:59:14,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684803242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753092261] [2022-11-16 19:59:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:14,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:14,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:14,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:59:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:59:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:59:14,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 19:59:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753092261] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:15,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:59:15,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-16 19:59:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265991259] [2022-11-16 19:59:15,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:59:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:59:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:59:15,130 INFO L87 Difference]: Start difference. First operand 4236 states and 6693 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:59:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:19,709 INFO L93 Difference]: Finished difference Result 11586 states and 19264 transitions. [2022-11-16 19:59:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:59:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-16 19:59:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:19,791 INFO L225 Difference]: With dead ends: 11586 [2022-11-16 19:59:19,792 INFO L226 Difference]: Without dead ends: 8537 [2022-11-16 19:59:19,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 19:59:19,822 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 1924 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 2942 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 3801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 2942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:19,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2008 Valid, 3458 Invalid, 3801 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [859 Valid, 2942 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 19:59:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-11-16 19:59:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 7336. [2022-11-16 19:59:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2376), 1539 states have call predecessors, (2376), 1639 states have call successors, (2376) [2022-11-16 19:59:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11740 transitions. [2022-11-16 19:59:20,813 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11740 transitions. Word has length 103 [2022-11-16 19:59:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:20,814 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11740 transitions. [2022-11-16 19:59:20,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:59:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11740 transitions. [2022-11-16 19:59:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 19:59:20,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:20,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:20,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:21,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:21,028 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1963665248, now seen corresponding path program 1 times [2022-11-16 19:59:21,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:21,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771417925] [2022-11-16 19:59:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 19:59:21,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771417925] [2022-11-16 19:59:21,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771417925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:21,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205030737] [2022-11-16 19:59:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:21,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:21,779 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:21,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:59:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:59:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:59:22,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205030737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:22,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-16 19:59:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132126807] [2022-11-16 19:59:22,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:59:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:59:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:59:22,330 INFO L87 Difference]: Start difference. First operand 7336 states and 11740 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 19:59:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:23,392 INFO L93 Difference]: Finished difference Result 13499 states and 21652 transitions. [2022-11-16 19:59:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:59:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-16 19:59:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:23,447 INFO L225 Difference]: With dead ends: 13499 [2022-11-16 19:59:23,447 INFO L226 Difference]: Without dead ends: 7358 [2022-11-16 19:59:23,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:59:23,486 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 417 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:23,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 2579 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:59:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2022-11-16 19:59:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 7336. [2022-11-16 19:59:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 5182 states have (on average 1.489193361636434) internal successors, (7717), 5472 states have internal predecessors, (7717), 1647 states have call successors, (1647), 468 states have call predecessors, (1647), 506 states have return successors, (2368), 1539 states have call predecessors, (2368), 1639 states have call successors, (2368) [2022-11-16 19:59:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 11732 transitions. [2022-11-16 19:59:24,248 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 11732 transitions. Word has length 107 [2022-11-16 19:59:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:24,249 INFO L495 AbstractCegarLoop]: Abstraction has 7336 states and 11732 transitions. [2022-11-16 19:59:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-16 19:59:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 11732 transitions. [2022-11-16 19:59:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 19:59:24,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:24,254 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 19:59:24,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:24,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:24,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash 866008532, now seen corresponding path program 1 times [2022-11-16 19:59:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831553339] [2022-11-16 19:59:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:24,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:59:25,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831553339] [2022-11-16 19:59:25,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831553339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011573362] [2022-11-16 19:59:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:25,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:59:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:59:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 19:59:25,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:25,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011573362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:25,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:25,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-16 19:59:25,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99818386] [2022-11-16 19:59:25,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:25,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:59:25,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:59:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:59:25,836 INFO L87 Difference]: Start difference. First operand 7336 states and 11732 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-16 19:59:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:28,683 INFO L93 Difference]: Finished difference Result 24998 states and 42985 transitions. [2022-11-16 19:59:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:59:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-16 19:59:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:28,861 INFO L225 Difference]: With dead ends: 24998 [2022-11-16 19:59:28,861 INFO L226 Difference]: Without dead ends: 17674 [2022-11-16 19:59:28,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:59:28,946 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 791 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 4271 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:28,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 4271 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:59:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17674 states. [2022-11-16 19:59:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17674 to 14582. [2022-11-16 19:59:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14582 states, 10332 states have (on average 1.485191637630662) internal successors, (15345), 10924 states have internal predecessors, (15345), 3283 states have call successors, (3283), 887 states have call predecessors, (3283), 966 states have return successors, (5481), 3016 states have call predecessors, (5481), 3271 states have call successors, (5481) [2022-11-16 19:59:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14582 states to 14582 states and 24109 transitions. [2022-11-16 19:59:30,754 INFO L78 Accepts]: Start accepts. Automaton has 14582 states and 24109 transitions. Word has length 134 [2022-11-16 19:59:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:30,754 INFO L495 AbstractCegarLoop]: Abstraction has 14582 states and 24109 transitions. [2022-11-16 19:59:30,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-16 19:59:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14582 states and 24109 transitions. [2022-11-16 19:59:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 19:59:30,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:30,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-11-16 19:59:30,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 19:59:30,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1883580168, now seen corresponding path program 1 times [2022-11-16 19:59:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:30,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449598338] [2022-11-16 19:59:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-16 19:59:31,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449598338] [2022-11-16 19:59:31,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449598338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:31,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:31,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 19:59:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087838244] [2022-11-16 19:59:31,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:31,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:59:31,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:59:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:59:31,872 INFO L87 Difference]: Start difference. First operand 14582 states and 24109 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-16 19:59:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:41,870 INFO L93 Difference]: Finished difference Result 55102 states and 95330 transitions. [2022-11-16 19:59:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 19:59:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-16 19:59:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:42,202 INFO L225 Difference]: With dead ends: 55102 [2022-11-16 19:59:42,202 INFO L226 Difference]: Without dead ends: 40532 [2022-11-16 19:59:42,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:59:42,341 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 3291 mSDsluCounter, 3725 mSDsCounter, 0 mSdLazyCounter, 8229 mSolverCounterSat, 1481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3394 SdHoareTripleChecker+Valid, 4251 SdHoareTripleChecker+Invalid, 9710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1481 IncrementalHoareTripleChecker+Valid, 8229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:42,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3394 Valid, 4251 Invalid, 9710 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1481 Valid, 8229 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 19:59:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40532 states. [2022-11-16 19:59:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40532 to 35037. [2022-11-16 19:59:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35037 states, 25848 states have (on average 1.489051377282575) internal successors, (38489), 26800 states have internal predecessors, (38489), 6460 states have call successors, (6460), 2463 states have call predecessors, (6460), 2728 states have return successors, (10627), 6199 states have call predecessors, (10627), 6440 states have call successors, (10627) [2022-11-16 19:59:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35037 states to 35037 states and 55576 transitions. [2022-11-16 19:59:46,571 INFO L78 Accepts]: Start accepts. Automaton has 35037 states and 55576 transitions. Word has length 140 [2022-11-16 19:59:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:46,572 INFO L495 AbstractCegarLoop]: Abstraction has 35037 states and 55576 transitions. [2022-11-16 19:59:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-16 19:59:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 35037 states and 55576 transitions. [2022-11-16 19:59:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 19:59:46,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:46,586 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 19:59:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:59:46,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 77619140, now seen corresponding path program 1 times [2022-11-16 19:59:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589836947] [2022-11-16 19:59:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:46,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-16 19:59:46,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589836947] [2022-11-16 19:59:46,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589836947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:46,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:46,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:59:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354335768] [2022-11-16 19:59:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:46,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:59:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:59:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:59:46,723 INFO L87 Difference]: Start difference. First operand 35037 states and 55576 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:59:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:50,684 INFO L93 Difference]: Finished difference Result 81862 states and 131642 transitions. [2022-11-16 19:59:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:59:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2022-11-16 19:59:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:50,978 INFO L225 Difference]: With dead ends: 81862 [2022-11-16 19:59:50,978 INFO L226 Difference]: Without dead ends: 46837 [2022-11-16 19:59:51,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:59:51,255 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 520 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:51,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1380 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46837 states. [2022-11-16 19:59:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46837 to 46468. [2022-11-16 19:59:55,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46468 states, 34331 states have (on average 1.489149748041129) internal successors, (51124), 35609 states have internal predecessors, (51124), 8512 states have call successors, (8512), 3253 states have call predecessors, (8512), 3624 states have return successors, (14110), 8175 states have call predecessors, (14110), 8492 states have call successors, (14110) [2022-11-16 19:59:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46468 states to 46468 states and 73746 transitions. [2022-11-16 19:59:55,735 INFO L78 Accepts]: Start accepts. Automaton has 46468 states and 73746 transitions. Word has length 172 [2022-11-16 19:59:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:55,735 INFO L495 AbstractCegarLoop]: Abstraction has 46468 states and 73746 transitions. [2022-11-16 19:59:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:59:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46468 states and 73746 transitions. [2022-11-16 19:59:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 19:59:55,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:55,752 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 19:59:55,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:59:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1220432249, now seen corresponding path program 1 times [2022-11-16 19:59:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806916546] [2022-11-16 19:59:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:55,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-16 19:59:56,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806916546] [2022-11-16 19:59:56,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806916546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:56,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014627710] [2022-11-16 19:59:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:56,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:56,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:56,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f339328c-9f25-4d8a-9be0-249758905c0d/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:59:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:59:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:59:56,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 19:59:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014627710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718801043] [2022-11-16 19:59:57,241 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-16 19:59:57,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:57,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:57,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:57,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:05,702 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-16 20:00:13,463 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-16 20:00:13,465 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-16 20:00:13,717 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-11-16 20:00:13,746 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-11-16 20:00:15,973 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-11-16 20:00:16,164 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 33 for LOIs [2022-11-16 20:00:16,167 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 33 for LOIs [2022-11-16 20:00:16,298 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-11-16 20:00:16,321 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 50 for LOIs [2022-11-16 20:00:16,339 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-11-16 20:00:16,354 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-11-16 20:00:16,367 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-11-16 20:00:19,662 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-11-16 20:00:20,361 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-11-16 20:00:20,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:53,839 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 643 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:01,326 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 643 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:10,199 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 770 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:23,373 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 677 DAG size of output: 572 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:30,444 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 661 DAG size of output: 565 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)