./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS --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 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- 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-8393723 [2022-11-19 06:41:17,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:41:17,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:41:17,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:41:17,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:41:17,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:41:17,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:41:17,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:41:17,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:41:17,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:41:17,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:41:17,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:41:17,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:41:17,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:41:17,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:41:17,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:41:17,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:41:17,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:41:17,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:41:17,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:41:17,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:41:17,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:41:17,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:41:17,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:41:17,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:41:17,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:41:17,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:41:17,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:41:17,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:41:17,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:41:17,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:41:17,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:41:17,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:41:17,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:41:17,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:41:17,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:41:17,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:41:17,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:41:17,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:41:17,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:41:17,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:41:17,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:41:17,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:41:17,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:41:17,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:41:17,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:41:17,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:41:17,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:41:17,785 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:41:17,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:41:17,786 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:41:17,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:41:17,787 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:41:17,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:41:17,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:41:17,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:41:17,788 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:41:17,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:41:17,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:41:17,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:41:17,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:41:17,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:41:17,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:41:17,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:41:17,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:41:17,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:41:17,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:41:17,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:41:17,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:41:17,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:41:17,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:41:17,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:41:17,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:41:17,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:41:17,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:41:17,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:41:17,796 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:41:17,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:41:17,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:41:17,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:41:17,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:41:17,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:41:17,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:41:17,798 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_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2022-11-19 06:41:18,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:41:18,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:41:18,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:41:18,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:41:18,130 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:41:18,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-19 06:41:18,235 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/data/243442d66/b5557850535b45fe9a9fc65b8e8a7e1b/FLAG9142b6d86 [2022-11-19 06:41:19,036 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:41:19,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-19 06:41:19,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/data/243442d66/b5557850535b45fe9a9fc65b8e8a7e1b/FLAG9142b6d86 [2022-11-19 06:41:19,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/data/243442d66/b5557850535b45fe9a9fc65b8e8a7e1b [2022-11-19 06:41:19,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:41:19,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:41:19,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:41:19,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:41:19,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:41:19,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:41:19" (1/1) ... [2022-11-19 06:41:19,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcf82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:19, skipping insertion in model container [2022-11-19 06:41:19,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:41:19" (1/1) ... [2022-11-19 06:41:19,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:41:19,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:41:19,981 WARN L234 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_0625be70-1240-4060-8517-6794f969e482/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-19 06:41:20,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:41:20,063 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:41:20,170 WARN L234 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_0625be70-1240-4060-8517-6794f969e482/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-19 06:41:20,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:41:20,219 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:41:20,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20 WrapperNode [2022-11-19 06:41:20,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:41:20,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:41:20,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:41:20,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:41:20,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,372 INFO L138 Inliner]: procedures = 92, calls = 346, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1091 [2022-11-19 06:41:20,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:41:20,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:41:20,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:41:20,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:41:20,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:41:20,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:41:20,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:41:20,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:41:20,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (1/1) ... [2022-11-19 06:41:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:41:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:20,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:41:20,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:41:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:41:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-19 06:41:20,574 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-19 06:41:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 06:41:20,574 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 06:41:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-19 06:41:20,575 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-19 06:41:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 06:41:20,575 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 06:41:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 06:41:20,576 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 06:41:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 06:41:20,576 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 06:41:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-19 06:41:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-19 06:41:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 06:41:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 06:41:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 06:41:20,577 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 06:41:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 06:41:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 06:41:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 06:41:20,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 06:41:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 06:41:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 06:41:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 06:41:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 06:41:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 06:41:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 06:41:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 06:41:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 06:41:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-19 06:41:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-19 06:41:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 06:41:20,583 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 06:41:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-19 06:41:20,584 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-19 06:41:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 06:41:20,584 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 06:41:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 06:41:20,585 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 06:41:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 06:41:20,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 06:41:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 06:41:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 06:41:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:41:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 06:41:20,588 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 06:41:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 06:41:20,590 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 06:41:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 06:41:20,590 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 06:41:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 06:41:20,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 06:41:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:41:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:41:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 06:41:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 06:41:20,874 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:41:20,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:41:22,425 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:41:23,394 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:41:23,394 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:41:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:41:23 BoogieIcfgContainer [2022-11-19 06:41:23,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:41:23,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:41:23,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:41:23,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:41:23,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:41:19" (1/3) ... [2022-11-19 06:41:23,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574edfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:41:23, skipping insertion in model container [2022-11-19 06:41:23,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:41:20" (2/3) ... [2022-11-19 06:41:23,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574edfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:41:23, skipping insertion in model container [2022-11-19 06:41:23,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:41:23" (3/3) ... [2022-11-19 06:41:23,415 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2022-11-19 06:41:23,438 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:41:23,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:41:23,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:41:23,565 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;@6cd9714d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:41:23,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:41:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-19 06:41:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:41:23,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:23,620 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] [2022-11-19 06:41:23,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1894499934, now seen corresponding path program 1 times [2022-11-19 06:41:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:23,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707240991] [2022-11-19 06:41:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:41:24,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:24,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707240991] [2022-11-19 06:41:24,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707240991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:24,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175957136] [2022-11-19 06:41:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:24,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:24,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:24,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:24,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:41:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:41:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:41:25,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:25,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175957136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:25,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:25,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 06:41:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315638256] [2022-11-19 06:41:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:41:25,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:41:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:41:25,752 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:41:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:26,254 INFO L93 Difference]: Finished difference Result 1153 states and 1836 transitions. [2022-11-19 06:41:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:41:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-19 06:41:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:26,279 INFO L225 Difference]: With dead ends: 1153 [2022-11-19 06:41:26,279 INFO L226 Difference]: Without dead ends: 745 [2022-11-19 06:41:26,288 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 [2022-11-19 06:41:26,292 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 513 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:26,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1296 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:41:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-19 06:41:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 733. [2022-11-19 06:41:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.5598377281947262) internal successors, (769), 524 states have internal predecessors, (769), 191 states have call successors, (191), 49 states have call predecessors, (191), 48 states have return successors, (193), 185 states have call predecessors, (193), 188 states have call successors, (193) [2022-11-19 06:41:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1153 transitions. [2022-11-19 06:41:26,426 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1153 transitions. Word has length 88 [2022-11-19 06:41:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:26,427 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1153 transitions. [2022-11-19 06:41:26,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:41:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1153 transitions. [2022-11-19 06:41:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 06:41:26,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:26,436 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] [2022-11-19 06:41:26,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:26,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:26,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1403473205, now seen corresponding path program 1 times [2022-11-19 06:41:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:26,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951240086] [2022-11-19 06:41:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:26,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:41:27,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:27,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951240086] [2022-11-19 06:41:27,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951240086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387928173] [2022-11-19 06:41:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:27,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:27,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:41:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:41:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:41:27,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:27,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387928173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:27,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:27,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 06:41:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807052866] [2022-11-19 06:41:27,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:27,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:41:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:41:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:41:27,931 INFO L87 Difference]: Start difference. First operand 733 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-11-19 06:41:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:28,206 INFO L93 Difference]: Finished difference Result 1795 states and 2854 transitions. [2022-11-19 06:41:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:41:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 [2022-11-19 06:41:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:28,216 INFO L225 Difference]: With dead ends: 1795 [2022-11-19 06:41:28,217 INFO L226 Difference]: Without dead ends: 1074 [2022-11-19 06:41:28,222 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 [2022-11-19 06:41:28,223 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 568 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:28,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1185 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:41:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-19 06:41:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2022-11-19 06:41:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 710 states have (on average 1.5676056338028168) internal successors, (1113), 756 states have internal predecessors, (1113), 271 states have call successors, (271), 68 states have call predecessors, (271), 68 states have return successors, (278), 264 states have call predecessors, (278), 268 states have call successors, (278) [2022-11-19 06:41:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1662 transitions. [2022-11-19 06:41:28,320 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1662 transitions. Word has length 87 [2022-11-19 06:41:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:28,323 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1662 transitions. [2022-11-19 06:41:28,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-11-19 06:41:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1662 transitions. [2022-11-19 06:41:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:41:28,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:28,332 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] [2022-11-19 06:41:28,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:28,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:28,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1601677810, now seen corresponding path program 1 times [2022-11-19 06:41:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747694390] [2022-11-19 06:41:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:41:29,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:29,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747694390] [2022-11-19 06:41:29,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747694390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:29,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:41:29,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:41:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644512490] [2022-11-19 06:41:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:41:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:41:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:41:29,195 INFO L87 Difference]: Start difference. First operand 1050 states and 1662 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:41:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:30,729 INFO L93 Difference]: Finished difference Result 3541 states and 5778 transitions. [2022-11-19 06:41:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:41:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-19 06:41:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:30,758 INFO L225 Difference]: With dead ends: 3541 [2022-11-19 06:41:30,759 INFO L226 Difference]: Without dead ends: 2503 [2022-11-19 06:41:30,772 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 [2022-11-19 06:41:30,777 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 828 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:30,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 4246 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:41:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-11-19 06:41:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1960. [2022-11-19 06:41:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1352 states have (on average 1.5754437869822486) internal successors, (2130), 1440 states have internal predecessors, (2130), 482 states have call successors, (482), 124 states have call predecessors, (482), 125 states have return successors, (529), 455 states have call predecessors, (529), 478 states have call successors, (529) [2022-11-19 06:41:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3141 transitions. [2022-11-19 06:41:30,980 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3141 transitions. Word has length 88 [2022-11-19 06:41:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:30,981 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 3141 transitions. [2022-11-19 06:41:30,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:41:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3141 transitions. [2022-11-19 06:41:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 06:41:30,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:30,986 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] [2022-11-19 06:41:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:41:30,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1173323453, now seen corresponding path program 1 times [2022-11-19 06:41:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035864584] [2022-11-19 06:41:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:41:31,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035864584] [2022-11-19 06:41:31,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035864584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:31,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844204929] [2022-11-19 06:41:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:31,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:31,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:41:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:41:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:41:32,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:32,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844204929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:32,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:32,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 06:41:32,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097129132] [2022-11-19 06:41:32,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:32,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:41:32,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:41:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:41:32,007 INFO L87 Difference]: Start difference. First operand 1960 states and 3141 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) [2022-11-19 06:41:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:33,442 INFO L93 Difference]: Finished difference Result 5763 states and 9465 transitions. [2022-11-19 06:41:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:41:33,443 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 [2022-11-19 06:41:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:33,483 INFO L225 Difference]: With dead ends: 5763 [2022-11-19 06:41:33,483 INFO L226 Difference]: Without dead ends: 3815 [2022-11-19 06:41:33,512 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 [2022-11-19 06:41:33,514 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 646 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:33,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 3008 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:41:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2022-11-19 06:41:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3785. [2022-11-19 06:41:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2528 states have (on average 1.5051424050632911) internal successors, (3805), 2750 states have internal predecessors, (3805), 1029 states have call successors, (1029), 224 states have call predecessors, (1029), 227 states have return successors, (1219), 946 states have call predecessors, (1219), 1023 states have call successors, (1219) [2022-11-19 06:41:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 6053 transitions. [2022-11-19 06:41:33,908 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 6053 transitions. Word has length 89 [2022-11-19 06:41:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:33,910 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 6053 transitions. [2022-11-19 06:41:33,910 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) [2022-11-19 06:41:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 6053 transitions. [2022-11-19 06:41:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:41:33,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:33,916 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] [2022-11-19 06:41:33,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:34,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:34,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash -331275658, now seen corresponding path program 1 times [2022-11-19 06:41:34,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:34,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489527559] [2022-11-19 06:41:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:41:34,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489527559] [2022-11-19 06:41:34,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489527559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:34,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239230473] [2022-11-19 06:41:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:34,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:34,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:34,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:41:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:41:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:41:35,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:35,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239230473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:35,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:35,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 06:41:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902464798] [2022-11-19 06:41:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:41:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:41:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:41:35,199 INFO L87 Difference]: Start difference. First operand 3785 states and 6053 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) [2022-11-19 06:41:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:35,759 INFO L93 Difference]: Finished difference Result 8289 states and 13335 transitions. [2022-11-19 06:41:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:41:35,760 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 [2022-11-19 06:41:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:35,806 INFO L225 Difference]: With dead ends: 8289 [2022-11-19 06:41:35,807 INFO L226 Difference]: Without dead ends: 4516 [2022-11-19 06:41:35,920 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 [2022-11-19 06:41:35,923 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 566 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:35,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1290 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:41:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2022-11-19 06:41:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 3722. [2022-11-19 06:41:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 2485 states have (on average 1.5038229376257546) internal successors, (3737), 2706 states have internal predecessors, (3737), 1017 states have call successors, (1017), 220 states have call predecessors, (1017), 219 states have return successors, (1166), 931 states have call predecessors, (1166), 1011 states have call successors, (1166) [2022-11-19 06:41:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5920 transitions. [2022-11-19 06:41:36,275 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5920 transitions. Word has length 88 [2022-11-19 06:41:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:36,276 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 5920 transitions. [2022-11-19 06:41:36,276 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) [2022-11-19 06:41:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5920 transitions. [2022-11-19 06:41:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 06:41:36,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:36,280 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] [2022-11-19 06:41:36,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:36,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:36,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1123085548, now seen corresponding path program 1 times [2022-11-19 06:41:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:36,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286237096] [2022-11-19 06:41:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:41:37,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:37,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286237096] [2022-11-19 06:41:37,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286237096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:37,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567899010] [2022-11-19 06:41:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:37,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:37,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:41:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:41:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:41:38,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:38,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567899010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:38,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:38,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-19 06:41:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008672969] [2022-11-19 06:41:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:38,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:41:38,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:41:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:41:38,274 INFO L87 Difference]: Start difference. First operand 3722 states and 5920 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) [2022-11-19 06:41:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:41,865 INFO L93 Difference]: Finished difference Result 9218 states and 14985 transitions. [2022-11-19 06:41:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:41:41,866 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 [2022-11-19 06:41:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:41,932 INFO L225 Difference]: With dead ends: 9218 [2022-11-19 06:41:41,933 INFO L226 Difference]: Without dead ends: 5508 [2022-11-19 06:41:41,983 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 [2022-11-19 06:41:41,985 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1619 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:41,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 2476 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 06:41:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2022-11-19 06:41:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 4062. [2022-11-19 06:41:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 2741 states have (on average 1.4866836920831814) internal successors, (4075), 2970 states have internal predecessors, (4075), 1077 states have call successors, (1077), 248 states have call predecessors, (1077), 243 states have return successors, (1228), 979 states have call predecessors, (1228), 1071 states have call successors, (1228) [2022-11-19 06:41:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6380 transitions. [2022-11-19 06:41:42,634 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6380 transitions. Word has length 94 [2022-11-19 06:41:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:42,634 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 6380 transitions. [2022-11-19 06:41:42,636 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) [2022-11-19 06:41:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6380 transitions. [2022-11-19 06:41:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 06:41:42,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:42,639 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] [2022-11-19 06:41:42,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:42,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:41:42,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1329423846, now seen corresponding path program 1 times [2022-11-19 06:41:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:42,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028279452] [2022-11-19 06:41:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:42,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:41:43,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:43,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028279452] [2022-11-19 06:41:43,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028279452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:43,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533558771] [2022-11-19 06:41:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:43,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:43,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:43,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:41:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:41:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:41:44,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:44,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533558771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:44,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:44,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-19 06:41:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512522389] [2022-11-19 06:41:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:41:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:41:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:41:44,297 INFO L87 Difference]: Start difference. First operand 4062 states and 6380 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) [2022-11-19 06:41:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:45,071 INFO L93 Difference]: Finished difference Result 8449 states and 13578 transitions. [2022-11-19 06:41:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:41:45,071 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 [2022-11-19 06:41:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:45,122 INFO L225 Difference]: With dead ends: 8449 [2022-11-19 06:41:45,123 INFO L226 Difference]: Without dead ends: 5228 [2022-11-19 06:41:45,141 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 [2022-11-19 06:41:45,142 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 139 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:45,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3166 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:41:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2022-11-19 06:41:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4286. [2022-11-19 06:41:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 2893 states have (on average 1.4811614241272035) internal successors, (4285), 3143 states have internal predecessors, (4285), 1136 states have call successors, (1136), 248 states have call predecessors, (1136), 256 states have return successors, (1327), 1048 states have call predecessors, (1327), 1130 states have call successors, (1327) [2022-11-19 06:41:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6748 transitions. [2022-11-19 06:41:45,607 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6748 transitions. Word has length 99 [2022-11-19 06:41:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:45,608 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6748 transitions. [2022-11-19 06:41:45,608 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) [2022-11-19 06:41:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6748 transitions. [2022-11-19 06:41:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 06:41:45,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:45,612 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] [2022-11-19 06:41:45,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:45,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:41:45,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2105034181, now seen corresponding path program 1 times [2022-11-19 06:41:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436734147] [2022-11-19 06:41:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:45,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:41:46,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436734147] [2022-11-19 06:41:46,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436734147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:46,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10877026] [2022-11-19 06:41:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:46,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:46,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:46,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:41:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:41:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:41:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:41:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 06:41:47,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10877026] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:47,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:41:47,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-19 06:41:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462529954] [2022-11-19 06:41:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:41:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:41:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:41:47,576 INFO L87 Difference]: Start difference. First operand 4286 states and 6748 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) [2022-11-19 06:41:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:52,247 INFO L93 Difference]: Finished difference Result 11696 states and 19385 transitions. [2022-11-19 06:41:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:41:52,248 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 [2022-11-19 06:41:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:52,334 INFO L225 Difference]: With dead ends: 11696 [2022-11-19 06:41:52,334 INFO L226 Difference]: Without dead ends: 8617 [2022-11-19 06:41:52,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 06:41:52,367 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 3093 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 1445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3180 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 4093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1445 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:52,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3180 Valid, 2974 Invalid, 4093 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1445 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 06:41:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2022-11-19 06:41:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 7416. [2022-11-19 06:41:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2400), 1563 states have call predecessors, (2400), 1663 states have call successors, (2400) [2022-11-19 06:41:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11828 transitions. [2022-11-19 06:41:53,206 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11828 transitions. Word has length 103 [2022-11-19 06:41:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:53,207 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11828 transitions. [2022-11-19 06:41:53,207 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) [2022-11-19 06:41:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11828 transitions. [2022-11-19 06:41:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 06:41:53,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:53,212 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] [2022-11-19 06:41:53,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:53,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:53,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:53,422 INFO L85 PathProgramCache]: Analyzing trace with hash 27441700, now seen corresponding path program 1 times [2022-11-19 06:41:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:53,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056315027] [2022-11-19 06:41:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:53,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:41:54,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056315027] [2022-11-19 06:41:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056315027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312863504] [2022-11-19 06:41:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:54,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:54,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:54,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:41:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:41:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:41:54,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:54,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312863504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:54,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:54,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-19 06:41:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148251232] [2022-11-19 06:41:54,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:41:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:41:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:41:54,738 INFO L87 Difference]: Start difference. First operand 7416 states and 11828 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) [2022-11-19 06:41:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:41:56,043 INFO L93 Difference]: Finished difference Result 13639 states and 21806 transitions. [2022-11-19 06:41:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:41:56,044 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 [2022-11-19 06:41:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:41:56,114 INFO L225 Difference]: With dead ends: 13639 [2022-11-19 06:41:56,114 INFO L226 Difference]: Without dead ends: 7438 [2022-11-19 06:41:56,161 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 [2022-11-19 06:41:56,162 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 424 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:41:56,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2597 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:41:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2022-11-19 06:41:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 7416. [2022-11-19 06:41:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2392), 1563 states have call predecessors, (2392), 1663 states have call successors, (2392) [2022-11-19 06:41:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11820 transitions. [2022-11-19 06:41:56,967 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11820 transitions. Word has length 107 [2022-11-19 06:41:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:41:56,968 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11820 transitions. [2022-11-19 06:41:56,968 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) [2022-11-19 06:41:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11820 transitions. [2022-11-19 06:41:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 06:41:56,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:41:56,975 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] [2022-11-19 06:41:56,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:41:57,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:57,184 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:41:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:41:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1596106138, now seen corresponding path program 1 times [2022-11-19 06:41:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:41:57,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241016730] [2022-11-19 06:41:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:41:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 06:41:57,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:57,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241016730] [2022-11-19 06:41:57,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241016730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:57,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009000977] [2022-11-19 06:41:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:41:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:57,938 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:57,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:41:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:58,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:41:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:41:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 06:41:58,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:41:58,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009000977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:41:58,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:41:58,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-19 06:41:58,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912489953] [2022-11-19 06:41:58,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:41:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:41:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:41:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:41:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:41:58,652 INFO L87 Difference]: Start difference. First operand 7416 states and 11820 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) [2022-11-19 06:42:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:01,371 INFO L93 Difference]: Finished difference Result 25214 states and 43217 transitions. [2022-11-19 06:42:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:42:01,372 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 [2022-11-19 06:42:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:01,532 INFO L225 Difference]: With dead ends: 25214 [2022-11-19 06:42:01,532 INFO L226 Difference]: Without dead ends: 17810 [2022-11-19 06:42:01,600 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 [2022-11-19 06:42:01,600 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 795 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 4013 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:01,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 4013 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:42:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2022-11-19 06:42:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 14718. [2022-11-19 06:42:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14718 states, 10400 states have (on average 1.4820192307692308) internal successors, (15413), 10992 states have internal predecessors, (15413), 3321 states have call successors, (3321), 917 states have call predecessors, (3321), 996 states have return successors, (5519), 3054 states have call predecessors, (5519), 3309 states have call successors, (5519) [2022-11-19 06:42:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14718 states to 14718 states and 24253 transitions. [2022-11-19 06:42:03,567 INFO L78 Accepts]: Start accepts. Automaton has 14718 states and 24253 transitions. Word has length 134 [2022-11-19 06:42:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:03,568 INFO L495 AbstractCegarLoop]: Abstraction has 14718 states and 24253 transitions. [2022-11-19 06:42:03,568 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) [2022-11-19 06:42:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 14718 states and 24253 transitions. [2022-11-19 06:42:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 06:42:03,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:03,586 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] [2022-11-19 06:42:03,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:42:03,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1842273458, now seen corresponding path program 1 times [2022-11-19 06:42:03,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805236374] [2022-11-19 06:42:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:03,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 06:42:04,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805236374] [2022-11-19 06:42:04,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805236374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:04,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:04,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-19 06:42:04,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956993761] [2022-11-19 06:42:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:42:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:42:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:42:04,798 INFO L87 Difference]: Start difference. First operand 14718 states and 24253 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) [2022-11-19 06:42:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:15,822 INFO L93 Difference]: Finished difference Result 55482 states and 95732 transitions. [2022-11-19 06:42:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 06:42:15,823 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 [2022-11-19 06:42:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:16,170 INFO L225 Difference]: With dead ends: 55482 [2022-11-19 06:42:16,172 INFO L226 Difference]: Without dead ends: 40776 [2022-11-19 06:42:16,299 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 [2022-11-19 06:42:16,300 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 3334 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 7638 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 4122 SdHoareTripleChecker+Invalid, 9135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 7638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:16,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 4122 Invalid, 9135 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1497 Valid, 7638 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 06:42:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40776 states. [2022-11-19 06:42:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40776 to 35281. [2022-11-19 06:42:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35281 states, 25970 states have (on average 1.4867539468617637) internal successors, (38611), 26922 states have internal predecessors, (38611), 6528 states have call successors, (6528), 2517 states have call predecessors, (6528), 2782 states have return successors, (10695), 6267 states have call predecessors, (10695), 6508 states have call successors, (10695) [2022-11-19 06:42:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35281 states to 35281 states and 55834 transitions. [2022-11-19 06:42:20,592 INFO L78 Accepts]: Start accepts. Automaton has 35281 states and 55834 transitions. Word has length 140 [2022-11-19 06:42:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:20,593 INFO L495 AbstractCegarLoop]: Abstraction has 35281 states and 55834 transitions. [2022-11-19 06:42:20,593 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) [2022-11-19 06:42:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 35281 states and 55834 transitions. [2022-11-19 06:42:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 06:42:20,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:20,606 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2022-11-19 06:42:20,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:42:20,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1036114187, now seen corresponding path program 1 times [2022-11-19 06:42:20,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50169409] [2022-11-19 06:42:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:20,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-19 06:42:20,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50169409] [2022-11-19 06:42:20,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50169409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:20,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:20,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865551348] [2022-11-19 06:42:20,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:20,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:20,757 INFO L87 Difference]: Start difference. First operand 35281 states and 55834 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2022-11-19 06:42:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:26,256 INFO L93 Difference]: Finished difference Result 82436 states and 132249 transitions. [2022-11-19 06:42:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:26,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 173 [2022-11-19 06:42:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:26,873 INFO L225 Difference]: With dead ends: 82436 [2022-11-19 06:42:26,873 INFO L226 Difference]: Without dead ends: 47167 [2022-11-19 06:42:27,141 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 [2022-11-19 06:42:27,143 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 527 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:27,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1390 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47167 states. [2022-11-19 06:42:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47167 to 46798. [2022-11-19 06:42:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46798 states, 34496 states have (on average 1.4868100649350648) internal successors, (51289), 35774 states have internal predecessors, (51289), 8604 states have call successors, (8604), 3326 states have call predecessors, (8604), 3697 states have return successors, (14202), 8267 states have call predecessors, (14202), 8584 states have call successors, (14202) [2022-11-19 06:42:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46798 states to 46798 states and 74095 transitions. [2022-11-19 06:42:32,739 INFO L78 Accepts]: Start accepts. Automaton has 46798 states and 74095 transitions. Word has length 173 [2022-11-19 06:42:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:32,740 INFO L495 AbstractCegarLoop]: Abstraction has 46798 states and 74095 transitions. [2022-11-19 06:42:32,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2022-11-19 06:42:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46798 states and 74095 transitions. [2022-11-19 06:42:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-19 06:42:32,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:32,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:42:32,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:42:32,758 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1134990666, now seen corresponding path program 1 times [2022-11-19 06:42:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:32,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464342817] [2022-11-19 06:42:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:32,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-19 06:42:33,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464342817] [2022-11-19 06:42:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464342817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573882244] [2022-11-19 06:42:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:33,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:33,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0625be70-1240-4060-8517-6794f969e482/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:42:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:42:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:42:33,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:42:33,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573882244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:33,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:42:33,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-19 06:42:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483112177] [2022-11-19 06:42:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:33,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:42:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:42:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:42:33,845 INFO L87 Difference]: Start difference. First operand 46798 states and 74095 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-19 06:42:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:42,875 INFO L93 Difference]: Finished difference Result 124608 states and 199792 transitions. [2022-11-19 06:42:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:42:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-11-19 06:42:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:43,666 INFO L225 Difference]: With dead ends: 124608 [2022-11-19 06:42:43,667 INFO L226 Difference]: Without dead ends: 81042 [2022-11-19 06:42:44,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:42:44,149 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 710 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:44,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 4636 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:42:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81042 states.